Keeping the drive-in burger joint alive sounds like a good idea to this company. Sonic Corp. operates the largest chain of quick-service drive-ins in the US, with more than 3,560 locations throughout the country. The chain has a significant presence in the South, namely in Texas. The eateries offer a menu of hamburgers, chili cheese hot dogs (Coneys), onion rings, and tater tots, along with cherry limeades and frozen desserts. Most locations offer drive-thru service and some have indoor seating. The company operates and has a majority interest in about 450 of the restaurants, while the rest are operated by franchisees.