A fast-food or quick-service restaurant provides the quickest service and food at the cheapest prices. The décor in most fast-food restaurants is simple. Fast-food restaurants are often franchises of a brand with many locations. The largest-fast food chains operate globally. Some individuals choose to open small, local, non-chain fast food restaurants. Fast-food restaurants often include a place to dine, while some may possess only drive-through or walk-up windows for customers to order and pick up food. Fast-food restaurants often serve hamburgers, chicken, sub sandwiches, Mexican fare or ice cream.