Ruby’s Diner, the fixture at the end of Oceanside Pier, is part of a restaurant chain, serving good typical diner food for breakfast, lunch and dinner. Ruby’s first restaurant opened in 1982 on the pier in Newport Beach. It’s a 1940’s diner atmosphere, with good hamburgers and. As the longest wooden pier on the west coast (1942 feet), you can get a good workout walking to the restaurant. 1 Oceanside Pier, 760-433-RUBY (7829).