Alex Ross: The Gotham Chamber Opera stages “Mahagonny Songspiel.”
Lotte Lenya never forgot the moment when she felt the musical world shift. It was in the rarefied setting of the German Chamber Music Festival, in Baden-Baden in 1927. “Mahagonny Songspiel,” the first collaboration between Lenya’s husband, Kurt Weill, and Bertolt Brecht, had just had . . .