Where are you mate?
How much notic are you giving people, if you wanna organsie a meet up, have a meet sunday afternoon, and then arrnage for a maccy Ds etc to get dinner, then onto the cruise.
I would say you need to give at least a weeks notice, lot of people A) dont do cruises on here, and B) dont check the forums very often, as alot have work/families/other commitments etc.