Inventor of the Frozen Margarita; Mariano Martinez opened his first restaurant in Dallas. Demand for his blended margarita was high, but the bar staff could not keep up with orders, as over 200 per night were produced from just one blender. At a local 7-Eleven, he noticed the Slurpee machine; he had an idea. 7-11 would not sell him a machine. Martinez bought a used ice cream machine in 1971 and modified the machine to make frozen margaritas. The rest is Margaritaville!