Well as per my earlier post Dee, it isn't a club in the strict sense (nor has it ever been, despite what people think - issuing a bit of plastic doesn't change your legal status in any way).
I mean if you go and join a porn site you don't get a membership card do you? Cos its just a website, which is all this is (except we make it a GREAT one!).
Formal clubs will have rules, regulations, a charter, nominated officials, treasurer, chairman, secretary etc...this website just has a single private owner, so its entirely up to him if he wants to issue a membership card...but as I said, its worth checking what your insurance company deems to be a 'club', otherwise you might just as well tell 'em your a member of this 'club'....
http://www.barryboys.co.uk/mx/
Personally I thinks tezzers idea is best, except Bat might have a view on copyright...!