"Looking for Mr. Goodbar". It's weird to see "Kay Adams" getting it on with a crazy Richard Gere (pre American Gigolo), a crazier Tom Berenger (pre, um, I guess Big Chill or Platoon), and a pathetic William Atherton (pre Die Hard), a young Levar Burton (same year as Roots).
Besides the above, this movie also has:
Sex, drugs, and disco.
A '70s gay bar
Diane Keaton reading "The Godfather"
A Kama Sutra light fixture
A cautionary tale for young women living by themselves