Any exhibitor who shall exhibit or permit the exhibition of any mechanical game device without first having obtained a license and registration therefor and paying the fees herein required, or any person who shall exhibit or permit to be exhibited any mechanical game device for which a license and registration has not been first obtained, or any person who shall exhibit or operate such machine or device or who shall permit the same to be exhibited or operated for gambling, or any person who shall violate this chapter or any rule or regulation of the Mayor established and adopted hereunder is guilty of a minor misdemeanor.