The Ritz Diner on the Upper Eastside is one of the many restaurants that serve cuisine similar to the classic American diner. The traditional diner is a prefabricated restaurant characterized by an exterior layer of stainless steel. Like a mobile home, the original style diner is narrow and elongated and allows roadway transportation. In the case of the diner, this is a carry-over from the first "true" diners ever built, which were never intended to remain stationary. The original diners (as opposed to "dining wagons") were actual dining cars on railways. When a dining car was no longer fit for service, it was often employed as a cheap restaurant at a (stationary) location near a train station or along the side of the railroad at some other location. Later, tradition—along with equipment designed to build railcars—kept this size and shape. In this original floorplan, a service counter dominates the interior, with a preparation area against the back wall and floor-mounted stools for the customers in front. Larger models may have a row of booths against the front wall and at the ends. The decor varied over time. Diners of the 1920s–1940s feature Art Deco elements or copy the appearance of rail dining cars (though very few are, in fact, refurbished rail cars). They featured porcelain enamel exteriors, some with the name written on the front, others with bands of enamel, others in flutes. Many had a "barrel vault" roofline. Tile floors were common. Diners of the 1950s tended to use stainless steel panels, porcelain enamel, glass blocks, terrazzo floors, Formica and neon sign trim. Diners built recently generally have a different type of architecture; they are laid out more like restaurants, retaining some aspects of traditional diner architecture (stainless steel and Art Deco elements, usually) while discarding others (the small size, and emphasis on the counter) (from wikipedia).