All Carnival ships sailing at least 7 days will have a time and place to meet FOD. It is not a party, but a meet and greet. Usually at the wine bar. If enough people ask, and up to the Cruise Director's decision would there be a party. The meet and greet will be listed in the Capers.
I have sailed twice with my cousin, and we go with him. Sometimes not many people, but is always nice to meet the people that show up.