Are Jersey Diners Disappearing To Make Way For Chain Restaurants?. This Jersey diner is almost 50 years old and now it is on the verge of demolition. New Jersey has the most diners in America, but is that number beginning to go down? According to NJ Spotlight News, “If you’re on the road in New Jersey and have a hankering for something to eat other than the same-old, same-old fast-food fare, you’re in luck. New Jersey boasts 530 diners, the highest number of any state.”