Just ask at the front desk. I recently stayed at the Cayman RC which was very nice as well. I asked about a possible upgrade when I checked-in. They mentioned that if I was willing to pay, I could upgrade to a club-room or even an ocean-front room. In fact, the manager took the time to actually show my wife and I exactly which room we could upgrade to if we so chose to do so. The view was awesome, but given that we weren't spending a bunch of time in the room, it just didn't make sense to pay the extra $100 or so per night.