In 1947, a young entrepreneur named G. “Jim” Hasslocher opened a small bicycle rental business at the front gate of Brackenridge Park in San Antonio. When summer arrived he started selling sliced, ice-cold watermelon next to his bike stand. It was here that he met his wife and lifetime business partner, Veva Ball. Soon Jim started selling charcoal-broiled hamburgers at a stand, which evolved into the first Frontier Drive-In. The popular drive-in was a favorite meeting place and became famous for its burgers, onion rings, milkshakes and carhops.