Havana would be Vegas on steroids if someone like Siegel or Dalitz had the forethought to know what the consequences of a Communist takeover would look like in the future. Shortsighted of them to think a change of leaders would be business as usual. With all their tentacles and reach the mob had 3k members at most, combined with cuban exiles and a silent partner in the US government they were.no match for Fidel. The only chance was to assassinate him which they failed to do. Cuba's still stuck in the late 50s to this day. If things went different it would be a UAE type paradise there today.