We were on Freedom last year and watched karaoke every night as a family. Our kids loved it and are looking forward to it on our next cruise. We will be going on Harmony next summer and looking at recent cruise compasses, it says Karaoke 18+ most nights. Our daughter will be 16 and is very shy. She won't sing, she just wants to sit and watch with us. She isn't interested in the teen club and would rather hang with her ultra cool parents yet. (ha ha) Will it be frowned on if she just joins us to watch? Is the age listed just to deter the kids and teens from hogging the mic or is there really adult content?