Free Sin City Burger promo: Free Sin City Burger (Single) with a purchase of any Double Burger
Offer valid Sept 12, 2019 only. 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. No cash value. Taxes not included. ©2019 Smashburger IP Holder LLC. All Rights Reserved.