§ 111.35 MINORS ON PREMISES.
   It is unlawful for a person under 21 to enter a licensed establishment with the intent to purchase, to be served or delivered any alcohol beverages. However, no city ordinance may prohibit a person 18,19 or 20 years of age from entering an establishment to:
   (A)   Perform work for the establishment, including the serving of alcoholic beverages;
   (B)   Consume meals; and
   (C)   Attend social functions that are held in a portion of the establishment where liquor is not sold.
Penalty, see § 111.99