My DD (13) loved the teen club, but we traveled with friends and they have a 15 year old DD, so she had someone to go up there with the very first night. She is a little shy so I am not so sure she would have done that if not for her friend. But once they got up there and met even more kids they had a blast! I very rarely so her, just for breakfast and dinner, and she would check in with us every once in a while during the day. My son (11), on the other hand, did not like the kids club. He did a few of the activities, but mostly just found his own friends and hung around the ship, swimming, arcade, movies, etc.
We did not leave Nassua at 7:30 PM, more like 10:30-11:00 PM, there was a Tropical SailAway party that night up on Deck 9, and the Teen Club was out on a Teen Junkanoo Jam from 7:00 PM -10:00 PM. On CC she just hung out on the beach with a few of the friends they made.
When you think of anymore ?'s just ask away, I'll do my best to answer.