You have to be 21 to get into the bars. So if it is a weekend of bar hopping you have planned then those who are underage might not have too much fun. However I agree with pbosak, if you're boating to the island then the docks are plenty fun to hang out on all weekend, well that is the public ones. So if it isn't just getting pickled you have planned to do there are lots of things that everyone might enjoy...parasailing, golf, wave runners, putt putt, caves, shops, bi-plane rides, fishing, the museum, tour train, biking, golf carts,swimming...all the resort stuff. But as the sun begins to fade...downtown transforms it's self into a 21 and over play ground.