On the Destiny they had a couple of things I hadn't seen before. One was a bathrobe party at the midnight buffet. The other was a scavenger hunt, based on the "Amazing Race", where the team of 4 people had to keep their arms interlocked while they found the stuff on their list. They also had a power bingo where the grand prize was a free 3-to-5 day cruise for two.
I am pretty good at keeping myself entertained. I am one who would rather sit on deck and people watch, or watch the waves. I enjoy the newlywed/not-so-newlywed game whenever I see it, though.