In addition to sleeping units, a motel or hotel may contain as an accessory use restaurant(s), cocktail lounge(s), meeting or conference rooms or facilities, swimming pool(s), a health club, cabanas, personal service shops, newsstand, shops for retail sale of gifts, sundries, newspapers, books and periodicals, limited food items such as candy, gum, cookies, soft drinks or bottled water; provided, however, that all such shops are sized and primarily intended for use or service to the motel's or hotel's guests, visitors or patrons. The Land Use Board may stipulate limitations on the size of such accessory uses in order to assure compliance with the stated intent. No food or refreshment shall be sold, vended or served through any opening in any building or part of building to the outside. The complete transaction and delivery of any food or refreshment shall be conducted within the principal building.