The oldest fast-food chain is White Castle, founded in 1921 in Wichita, Kansas. It started with a small stall that offered hamburgers and hot dogs. It also serves shakes, fries, and milkshakes.
Now, fast-food chains are big business. Over 36 percent of Americans eat fast food at least once a week. Fast-food chains employ about 3.7 million people, which is about the total increase of the American workforce every year.
About 2.6 millions of these workers are employed by just five fast-food chains: McDonald’s, Burger King, Wendy’s, KFC, and Taco Bell.