I knew you were going to say that. It doesn't take much wave action to disturb the inner ear. You would become accustomed to the movement after a while but what a horrible life. You are talking about living on that thing for years aren't you, no thanks. What would you do after you played cards 24/7 for a year, watch sea gulls?
Myself, as a magician can entertain myself and others for many hours a day with just a deck of cards. Sounds great to me!
After awhile the group would want to make changes to suit their entertainment needs. No way, would I want to work on a floating assisted living unit. I care about them but to be in contact 24/7....