@umamy
I did the scuba diving. Approx 50 EUR/dive. This includes equipment plus boat to dive spot. The offer two dive trips a day Mo-Sat: morning/approx. 9am and noon/approx. noon.
They pool interested divers from Luxe (next door) and St. Regis. We were 3 divers plus divermaster on a 12:00 noon trip.
They have a shark spot, a wrack and some nice drift dives. Unfortunately they won't tell you where they go until you start...