Cheers Frank. To be honest, I have only worked on one specific ship, and it's not part of a cruise line (this one) so my experience will not be the usual. And I was only on 3 week contracts. But if it's helpful, double bass and amp were provided, I played every night for three hours (that gets the old stamina together, especially on an unfamiliar double bass) in a jazz trio. As this ship is quite quiet, often there is only a handful of people we were playing to. If no-one, we'd play standards changing key each time and doing metric modulations. Good fun! (apparently) I was lucky as I didn't have to share a cabin and had modified guest status, but had I had the opportunity to it for longer periods when I was younger and single I would have done it. See the world, get your chops together, get out before you get too jaded!