It shall be unlawful for any person to engage in the business of resident, transient or itinerant portrait or commercial photography, or in the enlarging, copying, coloring or portrait finishing of photographs, or to solicit or offer for sale any of such goods or services verbally, by telephone, by mail, or by means of printed advertising in the city, without a license therefor.
('72 Code, § 32.04(a)) Penalty, see § 10.99