I remember a drive-in hamburger chain in Dallas called Kellers...
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Kellers is still there, I believe. Their burgers were great and so were the cold beers. ....Until Oak Cliff (a very large portion of Dallas at the time) went “dry” in the 1950s, Sivil’s Drive In served beer as well as all kinds of food. All of the carhops were on skates. There was a 2nd Sivil’s in Houston, and a photo of their carhops made the cover of LIFE magazine.