I'm guessing you're at the Radisson at 401 & Victoria Park?
I sometimes workout at Premier Fitness at Kennedy, south of Ellesmere. (416) 759-9847
Or you could try the Goodlife at Kennedy, north of Ellesmere. (416) 297-7279.
Or Fit-For-Life at Kennedy & Shepphard 416-298-8700.
They're both about a 5-10 minute drive from the hotel ... depending on if you're driving during rush hour.
All are good. But I think Premier has a better gym layout.
Good luck!
Enjoy the stay!!!