(A) No person under the age of 18 years shall be employed in any rooms constituting the place in which intoxicating liquors or 3.2% malt liquor are sold at retail on sale, except that persons under the age of 18 may be employed as musicians or to perform the duties of a bus person or dishwashing services in places defined as a restaurant, hotel, motel or other multi-purpose building serving food in rooms in which intoxicating liquors or 3.2% malt liquor are sold at retail on sale.
(B) No person under the age of 21 years may enter a licensed establishment except to work, consume meals on premises that qualify as a restaurant, or attend social functions that are held in a portion of the premises where liquor is not sold.