Coco Cay is a private island designed w/ all the amenities in mind. They serve basically the same lunch as in the Windjammer cafe. There are bars everywhere & lots of waiters selling "coco loco" in the sun in some kind of souvenier glass. If you can name a water sport, it's probably available on the island, although now that I think about it, I'm not sure about scuba diving. Your best place for this answer is going to be RCI's official web site.