famous chicago businesses only to chicagoans

i was driving around chicago the other day just for the sake of roaming the city(like i so frequently do) i noticed that chicago has many of the very succesfull mom and pop type of shops/businesses . the kind that expanded into 2-3 other store fronts or opened only a few more locations. the kind of businesses that have been around for a long time and established their name in chicago as part of chicago culture (to chiagoans at least).business that have in some ways been considered landmarks. places like; -Jade Dragon Tatto -Fantasy headquarters Costumes - Waveland bowling -Admiral Theater -The Alley -Harlem Furniture so what other places can you think of??>