[[Film/TheIncrediblyStrangeCreatures "The first horror monster musical,"]] released in 1964 by director Del Tenney. It is not a real musical, as it spends the first ten minutes with some musical accompaniment.

Because it's a "monster musical," the first three hours of this 78-minute film take place at a beach where [[DawsonCasting suspiciously middle-aged teens]] boogie to a live band while making lame attempts at humor. A college grad named Hank and his immature and unpleasant lady pal Tina drop by. The two bicker, Tina's flirting sparks a brawl with a biker gang, and finally the girl runs off to go swimming and is killed by a monster.

Turns out someone's been dumping barrels of radioactive waste into the ocean, causing the skeletal crew of a sunken ship to mutate into frog-fish things that proceed to hunt down and kill every young woman they can find. The elderly and ineffectual Dr. Gavin, assisted accidentally by [[EthnicMenialLabor black servant Eulabelle]], discovers that the things are vulnerable to elemental sodium. Taking their time, the heroes eventually get around to tracking down the monsters' lair (as the kill count climbs ever higher), work up the energy to get a load of sodium, and then throw it on the horrors of Party Beach.

Oh, there's also a replacement love interest for Hank named Elaine, but she doesn't do much besides not die. And all her dialogue has been redubbed by someone even older for some reason.

The film was revived from obscurity by both Michael Medved's ''50 Worst Films Of All-Time'', and by having clips of it in the film ''Film/ItCameFromHollywood'', before being a 1997 episode of ''Series/MysteryScienceTheater3000'', where it found a whole new generations of fans.

For the ''Series/MysteryScienceTheater3000'' version, please go to the [[Recap/MysteryScienceTheater3000S08E17TheHorrorOfPartyBeach episode recap page]].

!!Besides Horror, Party Beach provides examples of:
* TheAlcoholic: "Today Tina and alcohol are going to have a great cocktail!"
** Two of the victims are clearly drunks.
** Also, HypocriticalHumor, as one of the drunk guys says he hates drunks.
* ArtisticLicenseBiology:
** The frog-fish monster things are apparently human corpses whose every organ and tissue have been replaced with sea life, making them a "giant protozoa."
** Elemental sodium can kill the monsters because "protozoans are almost entirely made of water." Sure, but so is basically all other organic life on Earth, and touching pure sodium doesn't cause anything else to violently explode, so what the heck?
*** Also, the sodium is what reacts in that relationship, not the water. So there's absolutely no logical reason why gently brushing against a piece of sodium would cause the creatures themselves to violently disintegrate.
* BriefAccentImitation: Hank puts on a Southern accent whenever he speaks to Eulabelle; there doesn't seem to be any reason for this, almost making it look like he's talking down to her. Which doesn't work because Eulabelle actually does something useful.
* BrokenHeel: During the film's climax, the monsters ambush Elaine as she's searching for them in Fingall's Quarry. As she attempts to flee, Elaine [[HelpImStuck stumbles and gets her foot caught between two rocks]]; even after getting loose, the resulting TwistedAnkle prevents her from fleeing quickly enough to escape the monsters, and she only survives because the other characters show up in the nick of time.
* BucketBoobyTrap: During the slumber party.
* ButNotTooWhite: Hank and Elaine are both blond and bland. We're talking Wonder bread and mayonnaise here.
* ComicBookAdaptation: Believe it or not, there was one (with art by Wally Wood and Russ Heath, no less), and it's a collector's item now.
* DamselInDistress: Elaine's role for the film's finale, having tumbled down a slight incline and somehow gotten her leg trapped.
* DecoyProtagonist: Hank, Elaine, and Doctor Gavin are presumably the heroes of the movie, but almost every time the plot moves forward, it's because of Eulabelle's actions or her exhortations to the protagonists.
* DrunkDriver: Two of them at the same time. Played for laughs and completely, utterly botched.
** Which leads to a quite hilarious couple of lines from the SOL when the drunks fall victim to the monsters.
* DullSurprise: Both Hank and Elaine.
* EthnicMenialLabor: Eulabelle is an example of the "mammy" archetype.
* ExtraExtraReadAllAboutIt: Twice, with the same newsboy.
* FaceRevealingTurn: Completely and utterly botched via BehindTheBlack. A drunk guy finds someone slumped in a wrecked car, and chats amiably until the (breathing) corpse's head [[BehindTheBlack turns to the camera]], revealing half his face is a bloody mess. Except the drunk was staring at the wound ''the entire time'' and only reacted when it was turned toward the light.
* AHandfulForAnEye: During the beach fight.
* HardWorkMontage: Botched, terribly. There's an extended sequence of both the police and Doctor Gavin laboring mightily to find a way to stop the monsters, while the monsters themselves prey on at least three other young women -- except Dr. Gavin already ''knows'' what kills them by this point, and yet hasn't gone to the floundering police with his discovery, making everyone look worse than useless.
* HollywoodVoodoo: Eulabelle even has a VoodooDoll.
* ILoveNuclearPower: The radioactive drums spill a split-second after hitting the ocean floor, and begin mutating a human skeleton immediately. (The fish swimming all around the spill? Not so much.)
* {{Joisey}}: The setting of the film. None of the main characters sport an accent.
* JustForPun: The movie features tons of puns that six-year-olds would find unfunny. Example:
-->"Do you like bathing beauties?"\\
"I don't know. I've never bathed one!"
** Or:
--->[[[MaleGaze close-up of a gal's bikini bottom]], shakin' to the music as two guys stare]\\
'''Guy:''' That reminds me, did I remember to bring my hot dog buns?
* MenAreTheExpendableGender: Inverted. Of all the (known) victims of the monsters, and that's a lot, only three are male.
* MightyWhitey: Hank seems to think of himself as this, as seen in Brief Accent Imitation above. He's actually borderline useless unless Eulabelle is pushing him along.
* MonsterMisogyny: Twenty-four on-screen female deaths, not counting Victim Montages, compared to ''three'' killed males. "You think a lot of guys who make movies have issues with women?"
* {{Montages}}: A montage features more victims, subsequent reports (from the reporter or newsboy), Dr. Gavin at work... and some guy.
* NeverTrustATitle: The title would have you believe that this is a Frankie and Annette movie with monsters. However, only the opening takes place at the beach. The rest of the movie is a by-the-numbers monster flick with no beach in sight.
* OurZombiesAreDifferent: The monsters are described as "human bodies kept alive by radioactive decay," and completely "infiltrated by tiny seaplants." Presumably the monsters were growing in number by taking some of the bodies of their victims back to the water to make more.
* ReligionIsMagic: Eulabelle owns a VoodooDoll.
* ReplacementLoveInterest: Apart from about a minute of angst on Elaine's part, Hank and Elaine seem perfectly okay with hooking up, about ''two weeks'' after Tina's death. To be fair, he pretty much broke with her at the beach.
* RhymesOnADime: Eulabelle uses occasional but ubiquitously pointless rhymes as homilies: "You don't see me sitting around moanin' and groanin' all day." "What are y'all doin' sneakin' and peekin' in the dark?" It's the most fun you'll get out of this movie, and the best performance by any actor in the film.
* SameLanguageDub: For whatever reason, the actress who plays Elaine has been dubbed. Badly.
* TheScourgeOfGod: The hard-drinking exhibitionist Tina is the monster's first victim, leaving her boyfriend Hank to hook up with the chaste and sweet Elaine.
* TemptingFate[=/=]{{Retirony}}: Tina complains about how strait-laced Hank is and says "You go your way and I'll go mine, and we'll see who gets the most out of life!" About ten minutes later, she's dead in part because of her lack of inhibitions[[note]]Her flirting was what sparked the fight, and the cold shoulder Hank gave her afterwards is why she ran off[[/note]]. To be fair, dull, charmless Hank could live to 90 and not have gotten more out of life than Tina.
* {{Tsundere}}: Probably the best way to conceptualize Tina (besides "drunk"): "I never needed you, and I never will! ...Oh Hank, what happened to us?"
* UseYourHead: In a move which has wisely not been adopted by professional fighters, the biker gang uses their leader as a battering ram. But then again, Hank stood still for it, so...
* WhatTheHellHero: Eulabelle chews out Hank for giving up during his search for sodium without going through every supplier in the phone book. Sure enough, the next one he calls afterward has some.