time period, it had offered curb (carhop) service in addition to table service and takeout. At the time of its opening, Steak 'n Shake had locations in five states. The Route 66 Steak 'n Shake at Springfield, Missouri (built 1962) was listed on the National Register of Historic Places in 2012. The company entered North Carolina for the first time by opening a franchised location in Greensboro in December 1996. Steak 'n Shake entered Wisconsin with locations in Racine, Janesville and Madison in the late 1990s, but all locations closed by 2004. Another franchiser opened locations in Waukesha and Wauwatosa in 2007, but both closed by 2010. The chain has yet to return to the state. After briefly operating a few restaurants in south Texas during the 1970s, Steak 'n Shake returned to Texas by opening locations in the Dallas–Fort Worth area beginning in 2001, in the Houston area beginning in 2012, and in the San Antonio area beginning in 2013. Steak 'n Shake entered South Carolina for the first time by opening a location in Greenville in February 2001. The company entered Oklahoma for the first time by opening a franchised location in Edmond in 2004. Steak 'n Shake entered West Virginia for the first time by opening a franchised location in Barboursville in August 2007. Steak 'n Shake opened their first location in Nevada inside the South Point Casino in Las Vegas, Nevada in July 2010 and a second Nevada location in Reno in July 2013. In January 2017, a second location was opened in Las Vegas, the third in Nevada, in the Student Union building on the campus of the University of Nevada, Las Vegas followed by a second Reno location, the fourth in Nevada, in July 2017. Steak 'n Shake entered Louisiana for the first time by opening a location near Baton Rouge in Covington in 2011. The company first entered Colorado via a franchise in Denver in November 2011 before the parent took over the Colorado locations after a lengthy lawsuit between the franchisee and the parent company. In January 2012, they opened their first and only location in the state of New York on the island of Manhattan in New York City, adjacent to the Ed Sullivan Theater, then home to the Late Show with David Letterman. Indiana native David Letterman, an avid Steak 'n Shake fan, would frequent the location and mention it