In many areas of the United States, chicken wing festivals are held—with Buffalo wings being used in competitive eating events such as at Philadelphia's Wing Bowl and the National Buffalo Wing Festival. It has also become commonplace for restaurants to offer a wing-eating contest. Many bars and restaurants intentionally create an extra-hot sauce for this purpose, and customers are sometimes rewarded with their picture posted on the restaurant's wall or website, a commemorative T-shirt, a free meal or a combination of rewards for successfully completing the challenge.