Headed to LV in August. I have Mlife Gold so parking is covered for my wife and myself. Member of our party is looking at buying a Platinum card on eBay that is valid. I told him that he can access lounges at certain properties with platinum. He mainly wants it for parking/valet/lounges/line jumping. I would give him a spare that I have but gold is not welcome in lounges. Will people ask him for ID at buffets, valet, lounges? He's mainly looking at saving $90 in valet fees.