One of two feature films that actress Diane Keaton starred in in 1977. The other film was Annie Hall (1977) for which Keaton won the Best Actress Academy Award. Keaton was not Oscar nominated for her performance in Looking for Mr. Goodbar (1977). The movie did receive two Oscar noms though, for Best Actress in a Supporting Role (Tuesday Weld) and Best Cinematography (William A. Fraker) but failed to win either.
In the book, Theresa's sister Katherine goes to Puerto Rico to procure an abortion during a scene that takes place in the mid-1960s. In the movie, the timeline is changed so that this scene is set in 1975, two years after abortion was legalized by the Roe v. Wade ruling, making the trip to Puerto Rico unnecessary.
Theresa: First thing, on with the tv. Next - nothing. Just sit there on the bed watching the porno movie, I honest to God expect he's going to bring out a bag of popcorn. Finally, the big moment. He doesn't even take off his pants. And all the time he's doing it to me, he's watching them do it on tv.