Sorority Babes in the Slimeball Bowl-O-Rama

Sorority Babes in the Slimeball Bowl-O-Rama (also known as The Imp) is a 1988 sci-fi/horror B movie directed by David DeCoteau, loosely-based on the classic short story The Monkey's Paw.
It is notable as one of only two films in which legendary 1980s scream queens Linnea Quigley, Brinke Stevens, and Michelle Bauer appear together.
Plot
Brinke Stevens and Michelle Bauer play sexy Tri-Delta sorority pledges who are constantly being followed and spied on by three nerdy frat boys. In particular, they are watched during a long, erotic shower sequence as well as a secret hazing ritual where the girls receive a humiliating spanking with a sorority paddle.
The boys are soon caught sneaking into the sorority house by the den mother. The pledges are then ordered to steal a trophy from a local bowling alley aided by the unwanted boys. An accident during the robbery causes the trophy to break open, releasing an evil...