It shall be unlawful for any grouping or assemblage of persons, whose standing, remaining or congregating upon any public street or sidewalk shall obstruct, prevent or interfere with the free or unobstructed use of such street or sidewalk by other persons, to fail or refuse to move on or to disperse upon being ordered to do so by any police officer of the city or other peace officer.
(1964 Code, § 33-5)