Sonic Drive-In is an American fast food restaurant serving nearly 3 million customers regularly. It was founded by Shawnee in the year 1953. As per 2011 August report, it had overall 3,561 restaurants in 43 states of U.S. It had been ranked in 10th position in QSR magazine's ranking among leading 50 quick services. It has fast and casual restaurant brands in the country. Sonic Drive-In is basically famous for utilization of carhops on roller skates. It annually hosts competition for determining top skating carhop in the system. Mr. J. Clifford Hudson is the CEO and Chairman of the restaurant. It has $545.9 million as per 2011 report.