The most spacious liveaboard in the Caribbean is Cuan Law in the BVI's. It's massive - 2 separate flights of stairs down from the main level to board the tenders to take you diving.
Each stateroom adjoins the Main Salon which measures over 30 feet by 22. This is the social hub of the ship with luxurious real leather easy chairs and sofas, tables and a large bar. Around the mast are coolers for beer, wine and juices. The salon has two wide openings onto the cockpit deck where meals are served.
One of the better boats for non-dive activity, they have all the water toys and since many of the moorings in the BVI's are near an island, offer multiple off-boat excursions. They even carry two 14' Hobie Cats on board. And you can ski - although I think that's behind one of the zodiacs.
Aquacat has/does some of that also.