Spitting on sidewalks is expressly forbidden.

Sec. 54-134. Expectorating, urinating, defecating. It shall be unlawful for any person to expectorate, urinate or defecate on any public street, alley, sidewalk or floor of any public building, or any other place not intended or designated for such purpose where the public gathers or has access. (Code 1981, § 15-69)