Jane McCollum of Main Gate Square, Kurt Tallis of the Fourth Avenue Merchants Association, and Michael Keith of the Downtown Tucson Partnership present "Under Construction: How Merchants Along the Modern Streetcar Line Have Coped Through Smart Marketing" at a luncheon meeting of the American Advertising Federation of Tucson, from 11:30 a.m. to 1:30 p.m., Tuesday, Oct. 16; $20 to $50. Reservations are requested. Call 326-1060, or visit aaftucson.org for reservations and more information.