Rhinebeck Diner. ca. 1936, Rhinebeck, New York, USA, The RHINEBECK DINER On U.S. Route 9. RHINEBECK, NEW YORK. World's largest, most modern diner, built at a cost of $75,000.00. Opened May 7, 1938. Seating capacity 136 with private dining room seating 64. Features modern, fully equipped bakery, complete fountain service, spacious walk-in freezer, and large parking area. Cleanliness and sanitation stressed throughout. A. DJINIS, Prop.-Phone: Rhinebeck 281