I booked our Palo group brunch myself, and they asked for an exact headcount, as well as stateroom numbers. I told them 18, and it ended up being 16, as we had 2 no-shows. They didn't seem to care about that, and we weren't charged for them.
Our waiter brought seperate tags for each stateroom for the charges...
I would suggest asking to have your group seated in the main restaurant area, however. The private room is, in a word, HOT. Unless total privacy is a big issue, you would be much more comfortable in the open area...
ENJOY !!
'Beano'