Although a disappearing breed, these eateries still can be found in Chester County By Gene Pisasale, Special to The Times The DK Diner in West Chester is a classic example of a disappearing breed: the railcar or prefab diner. Once plentiful in Chester County, now it requires a bit of a hunt to find these gems of Americana. From Edward Hopper’s 1942 painting “Nighthawks” to Airstream-sleek...