Looking for Mr. Goodbar (1977)

"To her father, Theresa was a dutiful daughter. To the children she taught, Theresa brought warmth and hope. To the men she met in bars, Theresa was easy. All kinds of people loved Theresa. Diane Keaton plays Theresa in Looking for Mr. Goodbar."

Plot Summary

A short, unhappy affair with a married man leads a dedicated schoolteacher into the alcohol-and-drug fueled underworld of singles’ bars, where she begins to engage in a pattern of dangerous sexual activity.