No licensee shall permit, nor shall any person bring a person under the age of 18 years in or upon any premises operating under a license issued under the terms hereof, and no person under the age of 18 years shall enter or loiter upon the premises; provided, however, that this section shall not apply to hotels, motels, restaurants serving regular meals, clubs or bowling alleys, or to minors accompanied by a parent, guardian, or responsible adult in any establishment.
Penalty, see § 111.999