Monsters Crash the Pajama Party (1965)

Not 3-D but real flesh and blood monsters!

As a group of sorority rushes stay the night in an old mansion, they soon learn that their looks might be over, as well as their humanity! The Mad Doctor has turned the home into his secret lair, and is conducting an experiment to turn pretty girls into gorillas and monsters! Will our beauties become the beast? Not if the frat boys have anything to do with stopping the Doc!