Whenever you have a mixed gender group of friends, often there will be episodes where the women get their own adventure together without any of the men along. And similarly for the men. Because even though you are all good friends, sometimes you just need some Girl Time.
This is particularly common with a ¡Three Amigos! setup (two girls one guy/two guys one girl), and how the odd man out either feels lonely, or more commonly gets a side adventure with a minor cast member.
This makes sense in some cases. Would you want your guy friend there while you shop for lingerie, or would it really make sense having your female friend there trying out for the football team with you?
Similar to Girls' Night Out Episode, only:
This Trope is more like an expanded version of Girls' Night Out Episode because
- Girls' Night Out Episode is specific to one gender, this is not.
- Girls' Night Out Episode does not involve a subplot involving the other gender.
- While Girls' Night Out Episode is used as an opportunity to show off the few female members of the cast interacting with each other, this trope can apply to either gender and the purpose is less of a "just because we need to focus on the women" and more circumstantial.
- Lizzie McGuire, particularly in an episode where Lizzie and Miranda goes to buy bras as the A-plot, whilst Gordo hangs back to help Lizzie's little brother Matt and Mr. McGuire make a martial arts film as the B-plot.
- That's So Raven: Most of the time, while Raven and Chelsea were off doing some disguise adventure, Eddie was the the occasional big brother figure to Raven's brother Corey or the other son to Raven's Dad.
- Weird Science: Lisa tends to make Gary and Wyatt solve their own problems.
- Hannah Montana: Miley and Lily were almost always together while Oliver often ended up paired with either Jackson or Rico.
- A season one episode of Friends has the guys go to a hockey game, and the girls spying on George Stephanopoulos.
- There are a few episodes which follow this for iCarly:
- "iFence", where Freddie and Spencer took up Fencing. Sam had to read a book for a bet, whilst Carly had to deal with her cousins, and ended up getting mad because their fencing took too much time.
- "iWas A Pageant Girl" had Carly and Sam go off to a beauty pageant, with Spencer roping Freddie into a double date that derailed when they started playing the 'What Am I?' game.
- "iTake On Dingo" started with Spencer, Carly, Sam and Freddie all heading to the Dingo studio because they were ripping off their webshow. Once there, Freddie and Spencer split up to find the frozen severed head of Charles Dingo, whilst Sam and Carly beat up TV writers with a sock full of butter. Their stories came back together in the end, but it probably counts.
- Happened in the episode of That '70s Show when the boys went to Canada (including Leo) while Jackie convinced Donna to come with her to a modelling try-out.
- Naturally, Sadie: Rain would often be paired up with Sadie's brother Hal or one of the male supporting characters for a 'boy's adventure' while Sadie and Margaret where involved in a female plot.
- Happens regularly in Coupling, where pretty much every episode will have a separate discussion by the guys and the girls highlighting the different attitudes and perceptions of the two sexes. This is largely because the cast is composed or two Power Trios with alpha couple Steve and Susan as the centered egos, each with their own same-sex id and superego friends.
- Happens in Farscape but the gender subplots are separated into two different episodes: "Mental as Anything" for the guys and "Bringing Home the Beacon" for the girls.
- Super Sentai has one every year, often involving a female Monster of the Week who kidnaps the boys on the team or incapacitates them in some way, leaving the girls to rescue them.
- Dawson's Creek had some episodes like this. One that comes to mind is "Road Trip," where Dawson and Pacey go into the city to hit on girls and Joey and Jen deal with a rumor a jock started about Joey.
- Terminator: The Sarah Connor Chronicles had the one where John and Derek go to a military school to protect Martin Bledell while Sarah and Cameron stay behind to protect a child also named Martin Bledell.
- Leverage split the genders over two different episodes, called "The Girls' Night Out Job" and "The Boys' Night Out Job".
- Happens in the Community episode Aerodynamics of Gender, except Abed spends the whole episode with the girls. Shirley, Britta, Annie and Abed take a Women Studies class together and take down an evil Girl Posse using Abed's supreme observational skills. It backfires when the girls get high on power and become the new alpha bitches of the school. Meanwhile, Jeff and Troy find a hidden garden with a trampoline, which they promise the groundskeeper to keep a secret because trampolines aren't allowed on campus. Pierce realizes that they're hiding something and spends most of the episode trying to figure out what they're up to.
- Murdoch Mysteries: "Friday the 13th 1901" has two plots: Julia and Emily go to an island with several women friends for a weekend "hen party" (a bachelorette party) for one of the friends, while the guys of Station 4 play in a curling match on a bet. Brackenreid urges Murdoch to get involved in a effort to remedy the detective's depression over Julia's rejection of his marriage proposal, and true to form, Murdoch studies the game and invents a sliding shoe for the team. Meanwhile, the doctors' enjoyment of food, alcohol, tobacco and camaraderie are rudely interrupted by an axe murderer.
- In the Warehouse 13 episode For the Team, Myka and Claudia go off to hunt an artifact and are joined by (the female) H. G. Wells, while meanwhile Artie and Pete stay back at the Warehouse.
- Faking It had an episode in the second season where the girls have a night in - watching twilight and playing truth or dare, and the guys go out to a dive bar.
- Family Ties has an episode were Elyse takes Mallory and Jennifer away to a cabin for a mother-daughter weekend. Michael stays home with Alex and Andy and attempts some male bonding. Neither weekend goes well.
- Sort of subverted in Brooklyn Nine-Nine's "Paranoia." the ensemble splits between Rosa's bachelorette party and Adrian's stag party. It would be a perfect example of this trope, except Charles is at the bachelorette party, due to being one of Rosa's closest friends, enough that she asked him to be her "man of honor." On the other hand, Charles is rather In Touch with His Feminine Side.
- The Parks and Recreation episode "Two Parties" separates the cast by sex for the most part. Justified, since Chris and Ann are throwing Ben's and Leslie's respective bachelor/ette parties. Chris brings Ben, Jerry, Andy, Tom, and Ron along on a bunch of group activities subbing in for the bachelor parties they never got to have, while Ann's party for Leslie (bringing along April and Donna) is quickly derailed by a gambit Leslie pulled earlier and needs to undo.
- USA High has one where the boys go camping with Mr Elliot, which the girls organised so they can have a girls' night (which Miss Dupree joins in with).
- Most episodes of Kirby Buckets featured Kirby, Fish, and Eli in the A-Plot and Dawn and Belinda in the B-plot.
- The Little Busters! episode "Hell Yeah, This Totally Rocks!" has the girls trick Riki into coming to their sleepover and dress him in the girl's school uniform. When the other guys find out he has been "kidnapped", they spend the night playing games to decide who will be the one to rescue him.
- This happened in most of the second season of The Guild, with Zaboo moving into Vork's house and discussing girl troubles with Bladezz, while Clara and Tink took it upon themselves to help Codex with her love life.
- Every so often, The Simpsons has an episode where Bart and Homer are off together on a caper. As a result, the subplot has Marge and Lisa (and occasionally Maggie) dealing with something else. There doesn't appear to be an episode where this is reversed; if the main plot is about Lisa or Marge, then the guys just sort of hang around.
- Bart and Homer become truckers, replacing a truck driver that Homer literally ate to death, by which I mean challenged the trucker to an eating contest which the trucker won and then he immediately died, while Marge and Lisa deal with an annoying doorbell.
- Homer and Bart went to the Superbowl. Marge and Lisa had to deal with a Vincent Price egg painting kit that didn't come with any feet. They really do get the short straw.
- Homer and Bart become con-men, Lisa and Maggie have to deal with Marge's sudden addiction to Long Island Iced Teas. Although at the end, they re-enter the main plot as it turns out that isn't all they've been doing.
- The family get split up while camping in an early episode. Marge and Lisa manage okay; Homer and Bart suffer a Macho Disaster Expedition resulting in Homer being mistaken for Bigfoot; Maggie gets adopted by bears.
- Homer drives Bart to a camp while Marge and Lisa run a garage sale.
- When Kim Possible and her sidekick Ron get Trapped in TV Land with their arch-enemies, they quickly get divided by gender lines - Kim with Shego, and Ron with Dr. Drakken.
- In an episode of Teen Titans Go!, Robin, Beast Boy and Cyborg are having a boys' night out, so Starfire decides to rope Raven and Jynx (who she has to break out of prison) into a girls' night out. The boys do things like eat fries and try on hats, while the girls bring bumper cars to life and lead a high speed chase. Each side thinks their night was better.
- Dinotrux episode "Battering Ram" has the girls Skya and Ace investigating what happened to a device Ace has built while the guys look into breaking open a rock of junk to see what's inside.
- An episode of House of Mouse has Mickey allowing Minnie to host a "ladies night" at the club while he, Donald, and Goofy take the night off and go bowling.
- Kaeloo: Episode 60 has the boys and the girls split up and go to different places. Subverted since Stumpy winds up ditching the other guys, disguising himself as a girl and joining the girls.
- "The Quest for the Flying Rock", an episode of The Backyardigans, does this, pairing up Pablo and Tyrone, and Uniqua and Tasha. Both parties are searching for the titular rock, but they do so in completely different ways.
- This is actually pretty common in episodes where Austin is absent. Another episode, "The Snow Fort", has Pablo and Tyrone as Mounties guarding a gigantic snowball and Uniqua and Tasha as ski patrollers who help anyone who needs it. The girls think someone in the fort needs to be rescued, but when they come to the fort, the boys think they want to steal the snowball, so they turn on their booby traps and cause a lot of Slapstick Knows No Gender. It's not until the end of the episode that both sides see the situation from the other side.