This movie begins with the protagonist, a teenage girl (Ayn Ruymen) being kicked out by her roommate after she spies on said roommate and her boyfriend having sex (this is perhaps a little strange since the protagonist is quite the babe while her roommate is kind of a beast even by non-Hollywood standards). Fortunately, she has an aunt nearby who operates one of those old fashion LA hotels and who gives her a room and job. Naturally, the hotel is chock-full of weirdos, and one of the weirdest is a reclusive, voyeuristic photographer with whom the aunt seems to have some strange relationship. Things start to turn around for the girl. She meets a nice guy, and also becomes romantically involved with the strange but handsome photographer. Unfortunately, though several bloody murders occur in the hotel and her former roommate, who comes looking for her, meets a sticky fate. And someone seems to be stalking the protagonist herself.
Many times in the past I've heard some loutish guy say of a pretty girl that he'd like to "drink her bathwater". Well, the stalker here does a lot more than that (I couldn't really spoil it if I wanted to, but it also involves a blow-up doll and blood-filled syringe). This is Paul Bartel's first film. It was made before "Death Race 2000" or "Eating Rauol", but it holds it's own pretty well against those. It has a great creepy locale (I'd love to stay in one of these old LA hotels if there were still any around that haven't been turned into vastly overpriced B and B for tourists), and it has an effective horror/black comic atmosphere. The mystery here isn't all that surprising, but it sure is deliciously weird. Ayn Ruymen and the women who plays her aunt are both pretty good. Ruymen was very cute, and while I personally am much too cultured and refined to make crude comments about drinking her bathwater, I sure did enjoy seeing her in it.
Also don't confuse this with the later Howard Stern movie of the same name. This is less famous, but actually a lot better.