When you get on the ship, they take a group picture (for $15 purchase at the end of the tour). As you take off, the bar opens, and the pirates become your waiters! The music plays and everyone has a good time ... you go pretty far out in the ocean. It can get rough as you go past the cape, so I recommend motion sickness medicine. Also, I found that if you stand and "ride" the boat, you don't get as sick as if you sit really still and hold on for dear life.
They have a couple contests for men and women. The snacks consist of veggie sticks and pretzels (not bad!). Then the activities stop to watch the sunset and the pirates have a little skit and swordfight as you come back in to the marina. Also, be sure to use "el bano" before getting on the boat, or you're in for an extra adventure!