We had been looking forward to dinner at the Capital Grille prior to seeing a show. For $50+ per steak here, they were over salted, could be juicier and had more fat and bone than acceptable for the high price tag. We were eager to get to the show, quickly looked through the bill, paid and left. The next day, I reviewed the bill.The server heard us discussing what sides we were going to order, we decided on roasted mushrooms. When our meals were presented , the server also brought over mashed potatoes, He said he heard us discussing them as a side.Considering this a complimentary gesture, we left a large tip. We were charged $7 for about 2 tablespoons of potatoes that we didn't order. Unacceptable for an establishment of their kind. I wish we caught it before we left the restaurant.