On a side note, my parents just got off that ship and had a great time. I think my dad mentioned that one day they had some sort of tournament (not 100% sure about that, they go on a lot of these and it may have been another ship).
As for poker, he told me that the games were VERY soft. Like Stu said, no one wants to fold. My dad really doesn't know much about holdem, but is a pretty good poker player overall and he paid for the whole trip one night at the table.
He said lines were long when they could fill the table (there was only one) but I would think it is worth the wait.
GL!! I love cruises. You will have a great time.