Sonic Corp operates and franchises drive-in restaurants throughout the United States. The restaurants typically consist of a building that houses only a kitchen to go along with 16 to 24 parking spaces that have their own payment terminals, intercom speakers, and menu boards. Carhops serve customers in their cars. Many locations also have a drive-thru lane and patio seating as alternatives. Sonic franchises roughly 90% of its restaurants, and the royalty revenue the company earns on franchise sales contributes roughly a quarter of total company revenue. Company-operated stores provide the balance of total revenue. Sonic owns the property on which hundreds of its restaurants are located. For those properties that house franchised stores, franchisees lease from the company.