The McCord Museum in Montreal has an exhibition on costume balls that might interest many SFF fans.
McCord Stewart Museum
690 Sherbrooke Street West
Montreal, (Quebec) H3A 1E
“Over 40 dazzling outfits worn will be on display as well as photographs of guests in costume, souvenir publications and more —that capture the spirit and prestige of these grand events. This exhibition and the accompanying publication represent the culmination of a research effort which draws on the quintessential strengths of the McCord Stewart Museum’s rich collections. Many remarkable discoveries, unveiled to the public for the first time.”