Right now, membership is restricted to those other 18 unless it's a special event, just to avoid later issues. There will be a Christmas meeting for those that maybe don't have other family and need a new family/group of friends and we'll be voting like between Busch Gardens, Disney, Epcot or Sea World and more details will emerge as time passes.
I'm sorry those of you still young. When I was 15, we discussed Oedipus Complex in Psychology class and I raised my hand and said "Am I old enough to hear this?" to which my Professor replied "If you are old enough to be in my class, you are old enough to hear this."