I did the same thing. Then when the time to pay came, they put a fee on using a credit card. So, I refused and paid cash. They brought me my change but no coins since they didn't have any. They of course rounded down with what they gave me. I refused again and paid with credit card since the cash back made the total transaction better. The card was rejected for a double swipe so I then needed to use a different card. The waitress was pissed she had to make 5 round trips to pay. Fuck their policy. No tip.