Sing for Sweetie(1938)

Sally Newton is in love with Lee Sullivan, a young tenor singer with Johnny Johnson's Orchestra, but her father prefers a stuffy young clerk as her suitor. She makes him taker her to the nightclub where Lee sings. Lee has arranged for Sally to elope with him, his song "Let's Take It on the Chin" being the signal for her. But the clerk has hired a tough gangster to keep Lee from singing.