No person shall block, impede or obstruct any public place or any entrance, exit or approach to any place of business in or upon any public place in a manner calculated or with the intent to prevent, delay, hinder or interfere with the free passage therealong or therethrough of any other person who is entering, occupying or leaving any place of business, or who is performing any services or labor, or who is seeking or obtaining employment, or who is purchasing, selling, using, delivering, transporting or receiving any goods, wares, merchandise, services, entertainment, accommodations or articles, or who is attempting or seeking to do any of the foregoing; provided, that nothing contained in this chapter shall apply to lawful picketing. (Ord. 956 NCS §1; Ord. 46 CS §9; prior code §16.17(e).)