and I always watch!
Pretty much what MMMouse37 said is what there is, but it's really fun to see - & my husb. would say to be in. (He did the bellyflop contest on one of our cruises and thought it was a riot. Too bad someone got hurt. I think it hurts just doing it without trying to make a huge splash!)
Also, nearby is ping pong tournaments, basketball, etc. We didn't get to play volleyball last time, but the other 2 cruises we did. Basically, some guy just organized it.
We did the golf chipping contest (inside) last time and really enjoyed that. Thought it sounded boring, but we had a great time. The CM's make everything a lot of fun.