(a) It shall be unlawful for any person to smoke or carry a lighted cigar, cigarette or pipe in any elevator or in any retail food establishment commonly known as a supermarket.
(b) It shall be unlawful for any person to smoke or carry a lighted cigar, cigarette or pipe in any classroom or in any lecture hall, except that the owner or person in charge of such classroom or lecture hall may designate a special area or areas where smoking is permitted, unless otherwise prohibited by the Fire Department or by other law. The area or areas where smoking is permitted shall contain not more than 20% of the total seats of the classroom or lecture hall.
(c) It shall be unlawful, except as provided in subsection (e), for any person to smoke or carry a lighted cigar, cigarette or pipe in any theatre, motion picture theatre, opera house, concert hall, hospital, sanatorium, nursing home, convalescent home, home for the aged or chronically ill patients, museum or library.
(d) It shall be unlawful, except as provided in subsection (e), to smoke or carry a lighted cigar, cigarette or pipe in any enclosed public space in which 50 or more persons gather for religious, recreational, political or social purpose. This subsection shall not apply to:
(1) Any place in which social functions such as weddings, parties, testimonial dinners and similar functions are held and in which the seating arrangements are under the control of the sponsor of the function and not of the owner or person in charge of such place.
(2) Any establishment which sells admission tickets on a seasonal or other periodic basis.
(e) The owner or person in charge of any building, structure or place specified in subsections (c) and (d) may designate special areas therein where smoking is permitted unless otherwise prohibited by the Fire Department or by other law.
(f) Signs prohibiting or permitting smoking, as the case may be, shall be posted conspicuously by the owner or person in charge of each building, structure or place specified in subsections (a), (b), (c) and (d).