Pennsylvania Statutes Title 53 P.S. Municipal and Quasi-Municipal Corporations § 3702. City councils may prohibit;  exceptions

City councils in cities of the first, second or third class are hereby authorized and empowered to enact ordinances prohibiting the smoking or carrying of lighted cigarettes, cigars, pipes or matches, and the use of matches or fire producing devices in retail stores arranged to accommodate three hundred persons or more, or which employ twenty-five or more employes;  Provided, that any such ordinance, passed under the provisions of this act, shall not prohibit smoking in any restaurant room, rest room, beauty parlor, executive office   1 or any room designated for smoking in such store.

Such ordinances may also provide penalties for violation thereof.