Room service or in-room dining – KNOCK An Integral Part of Food & Beverage Service. A hotel service enables guests to choose items of food and drink for delivery to their hotel room for consumption. Room service is organized as a subdivision within the food and beverage department. Room service may be provided on a 24-hour basis or limited to late night hours only.The cost of customized orders and delivery of room service, Breakfast in Bed Served with a Cup of Coffee, Salad, Fresh Fruits and Eggs Benedict on a Wooden Tray. Breakfast in Bed Served with a Cup of Coffee, Salad, Fresh Fruits and Eggs Benedict on a Wooden Tray. Room service or in-room dining is a hotel service enabling guests to choose items of food and drink for delivery to their hotel room for consumption. It implies serving food and beverages in guest rooms of hotels. Small orders are served in trays. Major meals are taken to the room on trolleys.