At “Decades of Cocktail Dresses,” peruse a collection of gowns for sale from fashion icons including Giorgio Armani, Balenciaga, Geoffrey Beene, Tom Ford, Oscar de la Renta, Lanvin, Ralph Lauren, and Ralph Rucci. All proceeds benefit Helpers, an organization benefiting those who are developmentally disabled. Wine and dessert will be served. For more information, email helperssf@att.net.