Call Doug McClement at LiveWire Recording. He has a big remote truck but
he's been in Toronto for a long time and I'll bet he knows, and probably
has recorded in every venue in town. I'll bet he can suggest a place of
the proper size with a decent piano.
http://www.livewireremote.com/frames.asp?l1=contactus
If that doesn't work directly, go to the main web site and click on
Contact
Thanks!