It won't be in the capers. You will receive the invitation and a pin with that ship's name on your bed with the mints & capers the night before the party. (And yes they do collect the invitations at the door) Somehow on my 3rd Carnival cruise I wound up with a blue & red sail & sign card, I went to the purser's desk and they were quick to get that resolved.
Elation had a video presentation with a little bit about the history of Carnival. On Victory they had a live band and just talked a little about the history of the cruise line. Both parties were great and as someone else said free drinks are free drinks! They do only have the repeaters parties on 5 days or longer cruises.
Sovereign of the Seas, Royal Caribbean 11-17-03
Fascination, CCL 2-14-05
Fantasy, CCL 2-05-06
Elation, CCL 9-24-06
Carnival Victory, CCL 1-28-07
Sovereign of the Seas, Royal Caribbean, 9-24-07