If a building is "non-smoking" that means no smoking of any product intended to be smoked -- cigarettes, cigars, weed -- whatever. Given that so many are doing it now that it's legal, however, it sounds like no one has really complained much. Either because they smoke also, or they think smoking weed isn't counted as smoking, or they don't give a rat's eyebrow how anyone else feels about it.
It is obvious, despite Barbara Ortega's clearly ignorant post (ignorant because she apparently didn't grasp that the smoke was EVERYWHERE and not just a next door neighbor, which can be handle with just a visit to ask them to be more thoughtful).
Not to mention, 2nd hand marijuana smoke can produce effects on people who, for whatever reason, have to breathe it in when they don't want to. While it's a bit more benign than cigarettes, at that level of smoke going on constantly...sorry dudes and dudettes, that is in no way healthy for anyone.
Smoke is smoke.
If you want to get high, FFS, make brownies. JEEEESSSHH!