The name of this wildly popular casino hotel says a lot about the Rio. The corny Masquerade Village, the center of the action, offers an ongoing carnaval atmosphere. In the free ‘Show in the Sky, ’ Mardi Gras floats suspended from tracks in the ceiling parade above the gaming tables while racily costumed performers dance and lip-synch to pop rock and jazzy numbers, and toss shiny beaded necklaces to the crowds. The rambunctious fun is infectious. You can even ride along in one of the floats while having your souvenir photo taken for a fee (reservations required).