I would guess they are playing as part of the celebration..... "Line ups at almost all participating venues offered a strong indication that Nuit Blanche had surpassed even the most conservative audience estimates. Streets were clogged with people experiencing everything from: a fog sculpture; to night-time swimming; to a corn roast in Yorkville; to ballroom dancing; to large-scale projections of sheep on the Planetarium Roof. There was art in car washes, art on outdoor billboards, art on street corners and art in parks. Toronto's response to the first annual Nuit Blanche was beyond anything we had anticipated, said Jaye Robinson, Director of Toronto Special Events. Preliminary attendance figures estimated at 425,000 indicate that the event significantly surpassed the projected audience of 250,000."