A. It is unlawful for any person to operate any pool or billiard hall in this municipality if beer, as defined in this code, is kept, sold or consumed without first making a regulation and enforcing the same, keeping posted in a conspicuous place the terms of such regulation, which shall read: "No person under 18 years of age permitted in areas where beer is sold."

B. It is unlawful for any person in charge of or employed in such pool or billiard hall to permit any person under the age of eighteen years to enter upon or remain in any such premises of for any person under the age of eighteen years to enter upon or remain in areas where beer is sold.

C. Pool or billiard halls may be kept open to minors where no beer, as defined in this code, is kept or consumed or sold. (Code 1975 § 13-314)