Photo on the card.
I had my photo on the back of my Gold credit card when having a gold credit card meant something - i.e. I was loaded. This was the golden age of IT in the run up to the dot com bubble burst.
I had put my card behind the bar and drunk a good bottle and a half of red wine myself when I went to check out at the end of the night.
I'm not sure if the bar maid really was pretty or if it was the booze but she looked like an angel. When she asked me which card was mine I said: The gold one <pause for effect> with my picture on the back.
Didn't do me any good. I went home alone.