I'd rather have the smokers on a balcony high above the sidewalk than lining the sidewalk.
Transparency is probably what you don't want - otherwise it'll have that cluttered condo look and the two tints won't be distinct.
On the other hand, if it's too reflective, it'll just reflect the backside of the Law Courts (not very attractive) -
so maybe a darkly tinted glass and a silvery tinted accent glass would work.
There's an office building (Revenue Canada?) at 1050 West Pender that has two tones.
The tones are distinct on that building (although the building it self isn't attractive).
Marinaside Residences also tried to do the same thing
(green tint and blue tint on the same tower) and it doesn't show up enough.