No public garage, motor vehicle service station, mini-mart with gas pumps or private garage for more than five cars shall have a vehicular entrance closer than 200 feet to a church, school, theater, hospital, public park, playground or fire station. Such measurement shall be taken as the shortest distance between such entrances across the street if the entrances are on the opposite sides of the street and along the street frontage if both entrances are on the same side of the street or within the same square block.