OCTOBER 3 For one night, the city’s parks, alleyways and store fronts are transformed into exhibition spaces for contemporary art installations by more than 550 artists. Modeled after the Paris event, and dubbed “a free all-night contemporary art thing,” Scotiabank Nuit Blanche allows artistic revelers to carouse—for free!—from sunset to sundown at various museums and galleries, which are keeping their doors open straight on till morning. Beautiful Light: Four-Letter Word Machine by D.A. Therrien is among the highlights: four giant light sculptures suspended between the towers of City Hall project ever-changing four-letter words. Call 416-338-0338 for a list of participating venues. —Jenelle DaSilva-Rupchand.