They had the party, Goofy's Giggle Gala, on the St. Maarten day for our cruise. It was Tuesday night. Goofy came to the club and did activities and they got to color a pillowcase and keep it (still on DS7's bed). It is for the Oceaneer's Club, which is the 3-7 age group. It is listed as just one of the regular scheduled activities, no passes or sign up needed.
If you ask them and tell them how much she really wants to try it they may let her attend, not sure. She may get a pillowcase that she can color at the least.