It shall be unlawful to obstruct or permit the obstruction of any stairway, aisle, corridor or exit in any office building, factory, hotel, school, church, theater, assembly hall, lodge or other public hall or any building used by 2 or more tenants or families in a manner that it interferes with the free use of the stairway, aisle, corridor or exit.
('68 Code, § 79.26)