Originally Posted by
USHPNWDLUA
Also, the UA card also does not require you to be flying UA or any *A partner. The membership you get, unlike the DL membership with its card, comes with a full-fledged membership card, and showing it without a boarding pass is acceptable. You can even get a gate pass to visit the lounge even if not flying.
Correct me if I'm wrong, but you can't get into a non-UA *A lounge with that card unless you have a same-day boarding pass on a *A flight. The UA card gets you access to any UA lounge at anytime and any place like the UA Club at the SF 49'ers Levi Stadium, where there are no flights.
Some *A partners like BR get even more strict. They don't care what membership you have unless you have a BR boarding pass to go with it.
PP has different levels of membership. Most of them will not yield UA Club access. I don't think you'll be missing anything though.