Ah, right, cheers, never knew that. Maybe down to the club to make it a bit clearer, to save folks innocently stumbling into a less friendly area. Tho there's no accounting for aggressive muppets that can't hold their drink.
This. Sorry to hear that OP and his group had a bad experience. But the Amex is not Twickers and it's a bit naive to regard it as such, even in the Family Stand.