It shall be unlawful for any person, in or upon any public street, alley, or public place within the City to make any loud or unusual noise, or to speak in a loud or unusual tone, or to cry out or proclaim for the purpose of inducing or influencing, or attempting to induce or influence, any person to refrain from purchasing or using any goods, wares, merchandise or other articles, or for the purpose of inducing or influencing, or attempting to induce or influence, any person to refrain from doing or performing any service or labor in any works, factory, place of business or employment, or for the purpose of intimidating, threatening or coercing any person who is performing, seeking or obtaining service or labor or employment in any works, factory, place of business or employment. (Code 1962, § 27-50)