According to a recent book on Mob activities in Havana, the real Superman performed in a Havana club called the Shanghai. Supposedly he was gay . There were countless imitators until Castro took over. A guy I worked with who grew up in Miami played in his high school band. As a graduation reward, the school sprang for a weekend in Havana for the band. The guy told me, "As soon as we got off the boat, a whole buncha touts came up to us and whispered, "Great show, just like Superman..."