Had two friends of mine do this, one a dancer, one a bassist. On the one hand, it's good training. You'll be working sixteen hour days, bussing tables, tending bar, washing dishes, toting luggage, delivering room service, changing beds, and playing gigs from one end of the boat to the other, having to haul you and your rig all over while absolutely staying out of sight of the guests at all times. They both hated it and said they'd never do it again, and neither one has. When you divide hours worked by income, it comes out to about minimum wage with no overtime. You do have to read. That is not optional.