Mutual friend rented two yachts for his birthday. We were scheduled to depart at 10am, and the captains + their assistants were there right on time, although we had to wait because some of the people in the group were late. They take you over to The Playpen to get a nice view of the skyline, go swimming, and just hang out with everyone. They tied the two boats together so we could jump between the two. It was fun sitting at the front of the boats with everyone.
The only downside is one boat had a really nasty smell (maybe someone puked) and the toilet also got clogged in one (probably because someone flushed toilet paper, which you're not supposed to do). But the assistants and captains were super friendly and did not charge any cleaning fee. They also took care of all the cleanup, and had nausea medicine on hand for those who get seasick.
The price is expensive but if you split it up between a lot of people it's not too bad. We had until 10am-2pm (but they start heading back from The Playpen around 1:30pm). read more