I had breakfast at Denny's this morning. I had a coupon from the Rangers game for a free Grand Slam (with drink purchase required). I showed the host (David) the coupon when he seated me and asked if I could do any substitutions to the grand slam. David said "sure, you can build it to order". The waitress saw the coupon as I was ordering and told me "no substitutions are allowed". I told her that was fine, but she should tell the host since he told me just the opposite. At that point, the waitress changed her mind and said it was okay. When I went to pay, another host denied the coupon and caused a huge scene as she refused to even check me out because "it wasn't coming out of her check". I other host, David, came to check me out and he denied the coupon as well. A $6 breakfast isn't worth making a scene worse, so I paid the check and told them they've lost my business forever.