Sonic Drive-In on West 34th Street is the rare fast food restaurant where the parking lot is the point. You pull in, press the button, and a car-hop brings your order out — still the actual deal, not a gimmick.
The menu runs wider than most people expect from a drive-in: burgers and hot dogs, yes, but also chicken sandwiches, breakfast burritos, and a drinks menu deep enough to get genuinely indecisive about. The slushes come in more flavor combinations than anyone has fully mapped, and the shakes and ice cream treats are the reason the lot stays busy well past dinner. Sioux Falls has no shortage of drive-throughs, but the car-hop format here is a different pace — you're parked, not queued.
Locals on the west side treat it as a reliable pit stop rather than a last resort, which is its own kind of compliment. The happy hour drink deals keep the afternoon crowd coming back without needing much convincing. No dining room to navigate, no line snaking through a lobby — just pull in, order from the stall, and stay as long as the food holds out.