[UPDATED] Can you guess which year this photograph was taken, and where these girls were getting ready to perform? We'll update later with the answer and more details.

UPDATE: The first photo above was taken in 1947; more have been added, all taken in the late 1940s at the Copacabana. The club opened in 1940 and managed to stay open (albeit in various buildings) until 2007 (technically it's still alive, sharing space with another club). A few years ago the owner at the time recalled, "In the '40s and '50s, every star possible appeared at the Copa. You had to play the Copa if you wanted to get anywhere."