You did. As others already said, the bottom line is the neighborhood ninja club can kick you out if you carry a weapon. You have to decide if you want to play by their rules. Personally I would tell them I can't join unless i can carry. My time is limited and I won't waste it doing volunteer work for an organization that doesn't respect my human rights.I thought I could come back and get a few mature and informed opinions
Legally, if you have a CHL you can't carry in prohibited places. The club can't change that without changing the law. They also can't give effective 30.06 notice unless it's their property or they have the authority to make that decision for the property owner.