 Trains with high demand for dining car services sometimes feature "double-unit dining cars" consisting of two adjacent cars functioning to some extent as a single entity, generally with one car containing a galley plus table or booth seating and the other car containing table or booth seating only.In the dining cars of Amtrak's modern bilevel "Superliner" trains, booth seating on either side of a center aisle occupies almost the entire upper level, while the galley is below; food is sent to the upper level on a dumbwaiter.Dining cars enhance the familiar restaurant experience with the unique visual entertainment of the ever-changing view.