There are several nearby the swimming areas. For the main beach there are two. One at the waterspouts and on at the Pallazina (which I prefer) I know there is a small one at the AN beach and also the mineral Pool has one in the spa area. Hope this helps
Here are a few options, there may be others we don't know about. By the main pool behind the water sports building, behind the Palazzina on the right side by the conference room, at SSB to the left of the grill, in the Balloon Bar and in the game room. Maybe one by the spa or tennis courts?