Trivia / The Horror of Party Beach

• Cast the Expert: The Charter Oak Motorcycle Club portrayed the biker gang in the film.
• The Danza: Eulabelle Moore as Eulabelle.
• Dawson Casting: Recent college graduate Hank looks 38. Elaine looks even older. To be blunt, she looks to be in her in mid-40's, the movie expects us to buy that she's supposed to be in her early 20's, and is voiced by someone in her late 30's.
• Descended Creator: Director Del Tenney, who had began his career as an actor, played the monster trying to get the girls to leave the drug store.
• Dueling Movies: The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies claimed that it was the first monster musical. Neither film is a musical, however. Both just have some music acts performing in them. Though at least Creatures actually has more acts, and those in the acts are at least tied to the plot by tiny, invisible strings. The only thing they have in common is that they were featured on Mystery Science Theater 3000's 8th season.
• Follow the Leader: Following the trend in the mid-60s of beach themed films, popularised by Beach Party.
• Incestuous Casting: If you wonder why there's no screen chemistry between leads Hank and Elaine, that's because they were played by brother and sister.
• Looping Lines: Alice Lyon's voice was dubbed over in post production.
• Real-Life Relative: Besides the above, Del Tenney's son and daughter play the children watching a news report about the monster attacks.
• What Could Have Been: The head biker was originally supposed to appear in more scenes, but was injured in a bike crash during filming, so was unable to film his scenes.