? First, fast – food restaurants usually prepare and serve the items quickly. Second, many fast -food restaurants are part of fast – food chains. For instance, the biggest and most famous American fast-food chain serves hamburgers in every continent on the planet except Antarctica. Its menu items may not be exactly alike in all cultures, but its 25,000 restaurants all have the same look and style. The atmosphere seems comfortable and familiar. Third, the items at fast-food places usually cost less than meals in formal restaurants or special dishes made at home. And finally, people usually enjoy the taste of the food, even if it is not very nutritious.