I have taken two cruises both of 2 weeks and never found time but once to even play their piano, or even think about it. I did sit in with their jazz quartet one night because the piano player got a bout of diarrhea. Cruises are busy every minute. There is barely time to sleep. It would be a hassle to drag along a keyboard on a cruse anyway, in my opinion. I could hear my wife now
Bebop