No person shall bottle, pour, dip or measure any milk, cream, low-fat milk, skimmed milk or buttermilk for sale at retail in any vehicle upon any street, or in any other place than a milk room or place approved by the commissioner. Milk, when served by any hotel, restaurant, lunchroom, fountain or other place of public entertainment, shall be served in the original bottle, the cap of which shall not be removed except in the presence of the consumer or patron, but this provision shall not apply to cream so served or to mixed beverages of which milk forms a part, or to pasteurized homogenized milk or cream with or without flavoring dispensed from a refrigerated dispensing machine approved by the commissioner, if the location, maintenance and operation of the machine, in the opinion of the commissioner, provide full and adequate sanitary protection for the milk. Only pasteurized milk and milk products shall be served to consumers in any hotel, restaurant, cafeteria, hospital, lunchroom, school, public eating place or at any fountain or public eating place, whether served as milk and low-fat milk and cream or as a part of a mixed beverage.