i'm no expert but there are two i know of. Temptations and Golden Parnassus. I've stayed @ The Temptations resort when it was called Blue Bay Getaway. Beach isn't the greatest, in my opinion, but still a nice place.
By "adult" do you mean "adults only, no kids" or "XXX"? Most AI hotels offer a day pass, you pay for a one day bracelet, price depends on the hotel. I would say average price for a day pass would be around $75, some more, not many less.