Get a free Sin City Burger with purchase of any Double Smash Burger today, Thursday, September 12, 2019.
*Free Sin City Burger promo: Free Sin City Burger (Single) with a purchase of any Double Burger Valid only at participating restaurants. Valid only for Single Sin City Beef Burgers, no substitutions. Add-ons are an additional cost. One per check. In restaurant only. By guest request only. Not available online or through third-party delivery. Not valid with other offers or discounts. While supplies last.