No person shall park a bicycle upon a street. Bicycles parked on sidewalks in the business district shall be parked not further than two feet from the curb thereof and in no instance shall the bicycles be parked adjacent to or leaning upon the buildings and show windows in the business district. Bicycles parked in an alley, or on a sidewalk in the residential district or other public place, must be in such position as not to interfere with the safety or movement of the vehicular or pedestrian traffic.