Although few traces remain of Montreal’s Roaring Twenties era, the city was once renowned as an oasis of pleasure and transgression—where cabarets, illegal gambling and prostitution drew crowds in search of daring theatrical presentations and clandestine parties. This cultural and social ferment shaped the city’s nocturnal imagination, an era that La Nef intends to bring back to life with its concert Montréal la magnifique. Presented on April 2 under the direction of singer-songwriter and accordionist Steve Normandin, the show will bring together the talents of Guillaume Bourque (clarinet), Serge Lavoie (guitar), Clinton Ryder (double bass) and Catherine Meunier (percussion). “Sin…