In addition to sleeping units, a motel or hotel may contain as an accessory use restaurant(s), cocktail lounge(s), meeting or conference room(s), swimming pool(s), a health club, cabanas, a barbershop, beauty shop, newsstand, shops for the retail sale of goods, including tobacco, sundries, drugs, clothing, gifts, stationery, greeting cards and similar merchandise; provided, however, that such shops are sized and primarily geared to serving the needs of guests of the motel or hotel. With the exception of swimming pools and cabanas, all such accessory uses shall be within the principal building or structurally attached thereto and shall be primarily designed for the use and enjoyment of guests of the motel or hotel. The Planning Board may stipulate limitations on the size of such accessory uses in order to assure compliance with this stated intent. No food or refreshments shall be sold, vended or served through any opening of any building or part of any building. The complete transaction and delivery of food or refreshment shall be conducted within the principal building.