Do you have to be 18 or 21to go In? I'm wondering because of the cancer awareness event they're having in October

No you do not need to be of any age to get in. Need to be 21 to be served

I don't think so. Not very big inside....mostly outside with a huge covered pavilion or seating around the pond. I've seen people with kids there before.

You can go no matter what age. They sell drinks with no alchol and snacks also .