Steak 'n Shake (also spelled Steak n Shake) is a combination diner/fast food restaurant chain located throughout the Midwestern and Southern United States. Typical restaurant locations have both a drive-thru and front-window service, resulting in an atypical mix of fast-food to-go service and diner-style sit-down service. Many Steak 'n Shake restaurants are open 24 hours a day. Their slogan "Famous for Steakburgers" refers to their signature menu item, the Steakburger, so called because it is made from a mixture of T-bone, sirloin, and strip steak. Steak 'n Shake's prices are comparable to diners and other sit-down food establishments, which are generally higher than fast food restaurants.Steak 'n Shake restaurants are operated by Steak 'n Shake Operations, Inc., a wholly owned subsidiary of The Steak 'n Shake Company (NYSE: SNS), located in Indianapolis, Indiana. The company currently operates 490 (as of September 2007) restaurants (including 54 franchises) in 21 states.