I might have my friend's diamond card. He will NOT be in Vegas with us. I know I won't be able to use his RCs, but.... Can I use it to skip the Caesar's regular buffet line? Basically will they ask for ID to verify the diamond card is mine even if another buddy is paying for the buffet bill? Also how does the Diamond lounge work? Will they check ID if we wanted to go into the diamond lounge? or can I just flash it and walk in?