By their own admission, screenwriters Joan Didion and John Gregory Dunne spent only a day or so researching their assigned topicNew York junkiesand this early Jerry Schatzberg feature (1971) shows it, though Al Pacino plays one of the two romantic leads (along with Kitty Winn), and many of Schatzberg’s fans have praised the mise en scene. With Richard Bright, Raul Julia, and Paul Sorvino. 110 min. (JR)