Carnal Madness (1975)
Carnal Madness (aka Delinquent Schoolgirls, Delinquent College Girls, The Delinquents, Love Maniacs, The Sizzlers Scrubbers 2) is a 1975 exploitation film directed by Gregory Corarito and starring the unlikely trio of Stephen Stucker, Bob Minor and Michael Pataki as three escaped mental patients wreaking havoc in a female detention center.
More at Wikipedia.