In a moment of celebration (or madness), someone announces that everyone's drinks are on them! They might be a bartender, or a patron, or just an excitable party guest, but who cares who's paying for it? It's free booze!

Reasons to do this vary almost as much as reasons to drink in the first place. Maybe the buyer just won the lottery. Maybe there's a tense situation between a couple of patrons, and someone wants to avert a BarBrawl. Maybe they're just [[AlcoholInducedIdiocy drunk, stupid]], in possession of [[CreditCardPlot a credit card]] and overcome with love for mankind. It's also a tradition for golfers who've scored a [[CriticalHit hole-in-one]] (be thankful -- in Japan, the tradition is to buy everyone expensive gifts), and for [[PanickyExpectantFather new fathers]] (known as "wetting the baby's head").

Frequently parodied when after a moment's thought, the announcer realises just how many people there are, and [[AFoolAndHisNewMoneyAreSoonParted how much this is going to cost them]]...

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!!Examples:

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[[folder: Comics ]]

* ''ComicBook/BuckGodotZapGunForHire'': This starts off the events of "PSmith" -- Al the bartender meets the Thuxian of his dreams, and it's free drinks for everyone.
* Happens several times in the ''ComicBook/LuckyLuke'' comics. For example, when the Dalton Brothers come to a city in Canada, a gold digger arrives and uses his gold to buy a round. The saloon owner says that the gold diggers all do that and then go back to digging gold for another six months. Cue Joe Dalton planning to take over the saloon...

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[[folder: Film ]]

* In ''Film/TheMuppetMovie'', Fozzie defuses a BarBrawl by impersonating the bartender and shouting "Drinks are on the house!" Of course, this being the Muppets, this causes all of the brawlers to race to the roof of the bar [[LiteralMinded where they look futilely for the drinks.]]
* Henry Chinaski's "For all my friends!" in ''Film/{{Barfly}}''.
* Happens several times in ''Film/TheQuietMan'', and during the big fight scene, the bartender, Thornton and Danaher verbally fight over who's buying the drinks.
* ''Film/RedTails'' has our heroes given a round on the house in the officer's club in thanks for their bravery.
* ''Theatre/{{Oliver}}'' -- discussed (optimistically) in "Consider Yourself";
-->''If it should chance to be, we should see some harder days,\\
Empty larder days,\\
Why grouse?\\
Always a chance we'll meet somebody to foot the bill\\
Then the drinks are on the house!''
* [[BradPitt Paul Maclean]] does this in the gambling den in ''Film/ARiverRunsThroughIt'', believing he's about to have a lucky night.
* The theatre producer does this in the inn in ''ShakespeareInLove'', before exclaiming, apropos of nothing, "Oh, [[AnachronismStew happy hour!]]"
* In ''Film/{{Avatar}}'', after [[spoiler:Hometree is destroyed]], Quaritch proclaims that the first round's on him tonight to celebrate.
* ''HotShots'' plays this for laughs. One character announces that he's buying drinks for everyone, and incites a riot, complete with patrons FastRoping into the bar from the roof.
* ''Film/WakingNedDevine'': After the townsfolk successfully hoodwink the lotto man, the first place they go is down the pub, where they ''all'' offer to pay for the copious amounts of alcohol that is flowing.
--> '''Fitzgerald:''' [as everyone clamors to take the bill] I never thought I'd see the day!

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[[folder: Literature ]]

* ''Vagabonds of Literature/{{Gor}}'': Tarl is in a makeshift tavern in an enemy encampment when a BoisterousBruiser with whom he'd had previous dealings (to said bruiser's detriment) comes in to buy a round of drinks for everyone.
* In ''[[Literature/ElementalMasters Reserved for the Cat]]'', Jonathan pretends to be someone who just won a lot of money and is buying rounds to celebrate as a way to keep a reporter occupied while Thomas and Wolf search the reporter's apartment.
* In the Creator/MercedesLackey novel ''[[Literature/ElementalMasters Phoenix and Ashes]]'', Reginald routinely offers to buy rounds at the local pub. He's loaded and knows that the guys he befriended there [[INeedAFreakingDrink could use a drink]] since many of them (like him) were sent home after being injured in UsefulNotes/{{WWI}}.
* In ''Discworld/{{Snuff}}'', Vimes finds this to be a useful way of navigating the tricky diplomatic waters of drinking in [[MyLocal your local pub]] when you happen to own the entire village (you could say he's the landlord's landlord). Several times, he buys a round for all the patrons, generally as a way to earn their goodwill, and once in an attempt to avert a BarBrawl.

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[[folder: Live Action TV ]]

* In the ''Series/BabylonFive'' episode "Soul Mates", Londo is seen celebrating his impending divorce by getting smashed and buying drinks for everyone within range. "Barkeep! Another round for all my friends!"
* ''Series/BuffyTheVampireSlayer''. Warren announces that drinks are on him at the local demon bar to celebrate the fact that he's a BigBad who killed the Slayer. The demons respond by laughing at him, because they've already heard that Buffy survived the attack.
* ''Series/HowIMetYourMother'' has Barney loudly declare he's buying champagne for everyone in the bar. After the cheers die down, he quietly tells the bartender to give everyone ginger ale.
* Subverted in the [[SoOKItsAverage short lived]] detective series ''Series/{{Mayo}}'', where the titular character would say this to his team and be turned down by all of them [[EveryEpisodeEnding at the end of every episode]].
* ''Series/MyNameIsEarl'': Earl & Randy discovered that if a golfer hits a hole in one the tradition is for that golfer to buy a round for everyone in the clubhouse. So they make sure that that golfer gets a hole in one every time.
* In ''Series/{{Frasier}}'', when Niles is trying to persuade Daphne's father Harold to reconcile with her mother, this is the only way he can silence the jeering and get Harry's attention for five seconds.

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[[folder: Music ]]

* Big and Rich's song "Save a Horse, Ride a Cowboy" has this line- "And I buy the bar a double round of Crown".
* In Jason Michael Carrol's song ''Where I'm From'', the narrator's in the first class section of a plane. The man next to him says that the drinks up there are free, and he says "the first one can be on me".
* The song "[[http://youtu.be/p7Mi2-_4bTA Solomon Jones]]" by Aceyalone & RJD2.
-->''When, out of the night, which was dark and cold, into the smoke-filled dimly lit room''
-->''Stumbled into thug who smelled like bud, and his eyes looked high as the moon''
-->''He looked like a man with his foot in the grave, and his lifetime 'bout to be out''
-->''Yet he slapped down some hundred dollar bills on the bar, and he yelled out "Drinks on the house"''

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[[folder: Tabletop RPG ]]

* ''TabletopGame/DungeonsAndDragons''. In the 1st Edition Dungeons Master's Guide, buying a round of drinks for the house was part of the cost for "Frequenting Inns and Taverns", one of the techniques for [[YouAllMeetInAnInn finding potential henchmen]].

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[[folder: Truth In Television ]]

* In 2004 a businessman at a London nightclub said "[[http://www.wiziq.com/tutorial/75081-The-Drinks-Are-On-Me The drinks are on me]]". The nightclub patrons ordered 110 bottles of champagne, and he ended up with a bill for more than £42,000 ($59,000).
* In the United States, every now and then a moderately successful professional athlete might return to the college for which he played 2-3 years later and do this. They are inevitably surprised when the students immediately start buying the most expensive drinks in the house...''and'' also the same crappy drinks they had been drinking before in the same quantities.

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[[folder: Western Animation ]]

* In ''WesternAnimation/{{Rugrats}}'', "the drinks are on me" resulted in [[LiteralMinded everyone dumping their drinks on the character in question's head]].
* Parodied in Creator/TexAvery's ''TheShootingOfDanMcgoo'', when someone calls for drinks on the house. Sure enough everybody runs to the roof and starts drinking.
* On ''WesternAnimation/DuckTales'', after being totally humiliated in a bar, Scrooge [=McDuck=] subverts this trope:
--> And to show you there are not hard feelings, [[OutOfCharacterMoment I want to pay for a drink to everyone]]... who didnít laugh at me!
* Moe, on ''WesternAnimation/TheSimpsons'', celebrates Homer and Marge reaffirming their love by announcing "Hey, everybody! For the next 15 minutes, 1/3 off on every pitcher! ...only one per customer... Hey, no sharing!"
* On ''WesternAnimation/FamilyGuy'' Quagmire once offered to the buy the gang's drinks with his tax refund.

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[[folder: Video Games ]]

* In ''VideoGame/MassEffect2'', Shepherd can buy drinks for all of [[BadGuyBar Afterlife's]] patrons. The bartender tells you that there are a lot of patrons there that night and gives you the option of weaselling out.
* In ''VideoGame/MountAndBlade'', buying booze for everyone in town increases [[AllianceMeter your reputation]] for that town.
* This is a gameplay mechanic in the ''VideoGame/UnchartedWaters'' series: ordering a round of drinks for the entire tavern gives a temporary bonus to how many sailors you can hire there afterwards. The more money you spend on the drinks, the larger the bonus.
* In ''VideoGame/DragonAgeOrigins'', the Warden can convince/threaten Lloyd the bartender of Redcliffe's tavern to allow the militia to drink for free. Since their village is about to be attacked by another ZombieApocalypse, [[INeedAFreakingDrink they need those drinks]]. Best part? The Warden doesn't have to spend a single copper. He/she can simply ''threaten to murder Lloyd'' and take ownership of his tavern!
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