From my Oklahoma City postcard collection…
There were many, many independent cafeterias in Oklahoma City in the 1940’s, 1950’s and beyond. The Boulevard is the only one which remains open today. The Boulevard opened originally in 1948 in what is now the EMSA building. In 1975 it moved across the street to its’ present location. RetroMetroOKC.com has a nice history of the Boulevard.
Original Boulevard Cafeteria Location
Current Boulevard Cafeteria Location