People packed themselves into a theater as a jazz group played some upbeat tunes. "Piggy" planned to bring his girlfriend to the show, and after a comical trip from her place on his unreliable vehicle, they got there. A short bit with Al Jolson introduced a lively performance by Gus Arnheim’s orchestra. That's when she said they didn’t seem to know what they were doing—and then snatched a saxophone to have an impromp…