Controversial opinion: Not that good of a film
I finally rewatched this film after having not seen it since it was available as a rental on VHS.
I have to say I don't think the actual film lives up to the kind of unavailable legend that surrounds it. The cinematography is quite good and it does a fabulous job of portraying the grittyness of 1970s New York and the increasingly forgotten world of singles bars, or at least what they used to be like.
But as a film it seems to have problems. The sturm and drang of Keaton's relationship with her conservative parents seems off somehow, especially considering her sister's much freer lifestyle. "Saturday Night Fever" seemed to do a much better job with this rift between generational values. I'm not sure Keaton had any regret leaving her parent's house or going from college ingenue to one night stand veteran.
The narrative structure also seems to struggle to tell Keaton's descent into madness. It seems to kind of careen from scene to scene with little connection between the scenes. As a collection of snapshots it holds up better, but it doesn't seem to have much of a larger story to tell. I came away wondering whether Keaton was a modern woman who became a victim of freak violence or whether she was indeed sinking further and further into reckless abandon.
Even the closing sequence seems off, despite Keaton's awful choices in pickups.
Overall, it's definitely worth watching for film fans but more because of its obscurity and historical details than its actual quality as a film.