This Warner Bros. short film shows the process that studios use to select women for the chorus line in movie musicals. It then presents a few clips of chorus lines in Busby Berkeley producti... Read allThis Warner Bros. short film shows the process that studios use to select women for the chorus line in movie musicals. It then presents a few clips of chorus lines in Busby Berkeley production numbers from 1930s Warner Bros. musicals.This Warner Bros. short film shows the process that studios use to select women for the chorus line in movie musicals. It then presents a few clips of chorus lines in Busby Berkeley production numbers from 1930s Warner Bros. musicals.