I believe it depends on the lounge.
Member is liable for all accompanying guest visits and will be automatically charged $27 per guest after it has been reported by the participating lounge.
Anyway to tell if the card is still active?
Call PP
Platinum Card Access1*To gain admission, simply present your Platinum Card, a government issued ID, and a ticket valid for same-day travel to the club agent in:American Airlines Admirals ClubsŪDelta Sky ClubsŪUS Airways ClubsŪ(Note: ticket not required for US Airways Clubs)Airspace Lounges3Your Spouse and children under age 21, or up to two traveling companions, may join youTicket must be on the club's corresponding airline.