Anna Bailey was the first Black dancer to integrate an all-White chorus line on the Strip. She was one of the original showgirls at the Moulin Rouge, which, when it opened in 1955, was a racially integrated hotel-casino not only in Las Vegas, but also in the nation. “Follies,” the sprawling, beloved Stephen Sondheim musical that premiered on Broadway in April 1971, is a bittersweet melodrama.