Death Weekend (1976)

Director: William Fruet
Cast: Brenda Vaccaro, Chuck Shamata, Don Granberry, Don Granbery, Don Stroud, Ed McNamara, Kyle Edwards, Michael Kirby, Richard Ayres

Synopsis:

Harry is a rich dentist who often brings women up to his rural lakehouse. One weekend, he invites Diane, a former fashion model. On their way to the house, Diane runs a gang of thugs off the road. Humiliated, the thugs track down the couple for revenge.