Red Robin is celebrating Burger Month every day in May by offering Red Robin Royalty members a BOGO 50% off a burger or entrée at participating locations with the purchase of another of equal or lesser value. To sign up for Red Robin Royalty to receive this offer, as well as additional rewards and benefits from Red Robin throughout the year, visit www.redrobin.com/rewards or download the Red Robin mobile app. This offer is available at participating locations.