Having just gotten back, I can confirm the mood is certainly 'playful'. Most of the time, folks were pretty good at being somewhat discreet. However, at one point, a group of about a dozen people started doing body shots on the edge of the sexy pool. After a few round of those, pieces of clothing started being removed, and a whole lot of 'friendly activity' was going on for quite a while. Didn't see security at all during that stretch (maybe half an hour?), but the next day, the MC of the activities did mention it in passing, so clearly word had gotten out. For the rest of our time there, we didn't see anything nearly as overt. So short answer: it happens, but be discreet (if you can!)
A good place is about mid-day at the bikini Bar (the Quiet Pool's bar) say around 2:00 p.m. Fantastic place to be when bartender Tiger is working if you want a group of Fun-Lovers (contrasted with Fun-Haters, ack!) can get set up for a half-hour or so's good times setting up imaginative naked body shots. PM me and I can demonstrate. LOL!