The idea for the film came from a classroom exercise. With acting coach Burt Lane (later the father of Diane Lane), Cassavetes was conducting classes for aspiring actors at the Variety Arts Theatre in Manhattan's off-Broadway Union Square neighborhood, the classes listed as "The Cassavetes-Lane Drama Workshop"; this was Cassavetes' attempt to counter the adherents of method acting who controlled much of New York theatre and film. A particular exercise became the core of the film: A young African-American woman who was very light-skinned dated a young white man, but he was repulsed when he discovered she had a black brother. Cassavetes determined to put the scene on film, so he began looking for funding. While ostensibly promoting the film "Edge of the City" on Jean Shepherd's "Night People" radio show on WOR in February 1957, Cassavetes said he could make a better film than could director Martin Ritt. He pitched the drama workshop idea to Shepherd's radio audience. Cassavetes was surprised when listeners sent about $2,000 to start the project. Money also came from Cassavetes' friends, including Hedda Hopper, William Wyler, Joshua Logan, Robert Rossen, José Quintero, and Cassavetes' agent Charlie Feldman. Cassavetes hired German cinematographer Erich Kollmar as cameraman, the only crew member except Cassavetes with any experience in film.