The Last Room on the Left.

A young man knocks on the door of an old boarding house, hoping to rent a room. The owner answers the door in her bathrobe. She is hoping to get rid of the unexpected guest, but when she learns that he might be a prospective lodger, she agrees to show him around. The house is rather shabby and it keeps getting weirder with each room they see and each boarder they meet… The young man wants out, but leaving turns out to be pretty hard.