Just reading through the thread intending to suggest Jelly Rolls as well, and I see someone else suggested it just above. My oldest DS is just about to turn 16, and we've already agreed that when he's 21, Jelly Rolls will be a must. Jelly Rolls appeals to multiple age groups......can't think of a better place to spend a 21st birthday.....especially if the group includes family and if the birthday person is looking for something different than just traditional "clubbing" with other 21 year olds.
Have a great time!