All public buildings which may be or are used for church, school, opera performances, theater, lecture room, hotel, public meeting places or similar purposes, or which may be or are used for the collection of people for worship, amusement, or instruction, and all buildings used for stores to which the public is invited shall be so built that all doors leading from the main hall or place of assembly shall open outward, and all means of egress for persons within the buildings shall be by means of doors which shall open outwards from the main hall and from the building.