If you went to the Captain's Welcome Aboard party on your first cruise, you have pretty much seen what the past guest party will be. Music. Cocktails and canapes. Gladhanding by officers and cruise staff, etc. Usually the CD or Captain will thank you for cruising with Carnival again and perhaps give you some "inside info" on new ships that are coming soon. They'll narrow down who has cruised the most times and recognize them. I think they have a drawing for a prize too.