You can visit the various cruise forum boards and look into the different groups and theme boards to see if any groups you are interested in have cruises scheduled for the ship/week you are looking at.
It is time consuming and not always helpful.
(cruzin' solo by design)
Freedom ('09), Imagination ('08), Victory ('08), Destiny ('08), RCCL Navigator ('08), RCCL Majesty ('08), Glory ('07), Liberty ('07), Fantasy ('07), Destiny ('06), NCL PofAm ('05), Fascination ('04), Victory ('04), Fascination ('04), RCCL Voyager ('03), Fantasy ('99)
I don't know about that one but I can tell you about the one in October the 9th to the 13th on the Imagination. What a surprise that one was. Everything was okay until time for the formal pictures. It got so bad that we had to take the kids away from around them. The poses that they wanted was way too much for young kids to see. After getting on the ship talking to a couple of them, we found out that they book this cruise every year at the same time. Oh and there was only 389 in their group.