A City of Toronto Archives photo of the Imperial Six in its heyday.
It has a great look and is unlike most other movie houses. More importantly, it says 'Toronto' to me.
These mockups are just boxes folded up from bristol board with an HO scale image printed from my computer taped to the front. When I look at the Six the people still seem a bit too large - they might be OO in the image - but the building itself doesn't look too bad. I'll have to ponder this one a bit more because I'm still a bit uneasy with the dimensions.