Plaza Theatre, 128 S Palm Canyon Dr, Palm Springs. June 21st. 42nd Street — the 1933 Warner Bros. film that is simultaneously a Depression-era backstage musical and the movie that defined what the film-musical could be — projected at the Plaza Theatre in Palm Springs, which is the venue built for this exact kind of presentation. 42nd Street is the film that coined the phrase "you're going out a youngster, but you've got to come back a star," delivered it like it was written to be delivered by Dick Powell's face at Warner Bros. in 1933, and launched Ruby Keeler's film career simultaneously. The Busby Berkeley choreography is the other …