Ruby's Diner is a classic American restaurant serving hamburgers, french fries, and sandwiches. It sits next to the Levi's store by the parking lot at the entrance to Citadel Outlets in Los Angeles. Burgers such as the cheeseburger and bacon burger come with fries, hot dogs are also on the menu, and coffee is refilled without limit. The interior is retro-style, tables come in several sizes, there is a children's menu, food arrives quickly after ordering, and the milkshakes are strongly sweet.