Kenosha’s Historic Lunch-Car Diner In 1917, the Jerry Mahoney Diner Company began manufacturing roadside diners. The long and narrow prefabricated buildings were trucked on railroad flatcars to various locations across the United States, and were often confused with actual railroad cars. One such diner arrived in Kenosha, Wisconsin, in 1926, and it’s now the oldest continuously-operating lunch-car diner in the country. READ MORE