We sailed the western caribbean on the Zuiderdam, which is very similar to the Westerdam, this summer. There are a wide variety of ages on the ship from families to seniors and everything in between. We did not really notice a "majority" of any one age group. There are a vast number of activities to choose from, more than you can really do if you go on shore for the port days. I am 46 and I sailed with two 18 year olds. The things we chose to do were: - Attend almost all the shows (magician, comedian, juggler, etc) - Hang out in the disco various nights - 50's dance in the Crow's Nest - Pool games - Movies - Ice carving demonstration - Bingo (for me) while the girls baked themselves - Participate in the "Impersonator" show (cool since you get to go backstage) Of course there was also eating and lounging by the pool! Other things that looked interesting but we didn't have time for were karoke, line dancing lessons, trivia contests. I'm sure you will have no problem keeping busy (or choosing to relax). Have fun, we sure did!