My wife and I visited Cuba 14 months ago. The tour guides all spoke reverently about Meyer Lansky (the real life Roth), but they were probably giving the gringo tourists a good time, so to speak. The Nacional is still Havana's poshest hotel. A major attraction for tourists is a nightly, full-tilt floor show that they bill as an "authentic" re-creation of the kind of lavish costumed gala that we saw in GFII.
No, we didn't see a "Superman" show while we were there.

A guy I worked with years ago, who grew up in Miami, played in his HS orchestra. As a reward, the school treated the seniors in the orchestra to a weekend in Havana. He said that, as soon as the ferry from Miami docked in Havana, local touts besieged the kids with offers to see shows "just like Superman."