A club - a properly constituted club - belongs to its membership and is perfectly entitled to set its own policies. If those policies don't suit non-members, that's just Tough-Titty, it's the members' club, and the club's policies are the prerogative of those members. Non-members have no dog in the race.

However, it seems perfectly reasonable to expect them to include their policies in respect of would-be visitor-performers in their advertising. Not only would it help to save pointless journeys, it would also be a help in preventing any 'unpleasant' situations.

It's not rocket-science, is it?