Urban Shocker
Doyenne
( they must all be extant )
The rooms mentioned thus far have among the most meritorious in my opinion as well, and I'll add one that shouldn't be forgotten:
Banking Hall, Commerce Court North
Darling and Pearson, 1931
Galleria Italia, Art Gallery of Ontario
Frank Gehry, 2008
Longhouse, Native Child & Family Services
Levitt Goodman Architects, 2010
Rotunda, Royal Ontario Museum
Chapman and Oxley, 1933
The sanctuary of Holy Blossom Temple by Chapman & Oxley 1937
Any more favourites, boys and girls?