Prideweek will have the entire hotel stock in Toronto booked. A huge influx of people into the city. I think if you try calling around, to get any hotel room for next weekend, I think you'll have a tough time. You can also expect the same thing during the Film Festival, among other events.
It's exactly as SGM says, its the reputation and size of the event that is selling out the hotels.
It is good to hear that 1KW will reap the benefits of this as well, but its real test is the time in between, and its ability to translate the revenue (expected and unexpected) into profit.