Portillo's Restaurant Group, Inc. is an American fast casual restaurant chain based in the Chicago area that specializes in serving Chicago-style food such as hot dogs, Maxwell Street Polish, and Italian beef. The company was founded by Dick Portillo on April 9, 1963, in Villa Park, Illinois under the name "The Dog House". Outside of Chicago metropolitan area and Northern Illinois, the chain also has four locations each in central Illinois, the Indianapolis metropolitan area, and the Phoenix metropolitan area; three locations in the Minneapolis-St. Paul metropolitan area and Tampa metropolitan area; two locations each in the Milwaukee metropolitan area, Madison metropolitan area, Orlando, and Southern California; and one location each in Metro Detroit, South Bend metropolitan area, Fort Wayne, Dallas–Fort Worth metroplex, and the Quad Cities. History Portillo's was founded in 1963 by Dick Portillo. After returning from serving in the Marines, Portillo gathered money from his savings and from an investment from his brother Frank to open a hot dog stand. They bought a 12-foot trailer that had no restroom and no running water. They named it "The Dog House". The Dog House operated on North Avenue in Villa Park. At the beginning stages, the stand was losing money and Portillo needed to find a solution. Portillo went to do some research one day on how other competitors were operating and snuck into one of the back rooms of a competitor and wrote down where they were purchasing their product. He continued the process of learning by visiting different competitors. By 1967, The Dog House was in good standing, was upgraded to a larger trailer, and was renamed "Portillo's". In 1970, he partnered with Harold Reskin and opened up his second location in a shopping mall that Reskin owned. Between 1972 and 1989, he opened up a second restaurant under the name "Barney's" that specialized in BBQ meals. In 1983 Portillo's opened up its first drive thru in Downers Grove. In the 90's Portillo's had profited by more than $50 million with 25 stores around the Chicago area. In 1993, he experimented with a few ideas by combining his concept stores Barney's and Barnelli's with a Portillo's restaurant. In 1994, the first Portillo's within Chicago city limits opened at the intersection of Clark and Ontario St. In 1995, Portillo opened Key Wester Fish & Pasta House in Naples, Florida. In 1996, Portillo brought the Key Wester Fish &