Nightmare Sisters (1988)
Melody, Marci, and Mickey are three geeky college girls who can't get a date. One night, they invite some geeky college guys over and have a seance that results in the girls becoming possessed and turning into sex starved vamps. Will the geek hero guys be able to stop the horrible (?) possession? exploitation, seduction, sorority, occult, succubus, séance
ETC.
