Do they allow smoking on the balconies? Or have a smoking area?

There's no smoking, but people smoked outside on the balconies anyway. You just have to worry about people like Andre, with their "no smoking" with multiple exclamation points.

No smoking!!!!

They told me smoking on the balconies was ok

I smoked on the balcony. I didn't see a sign not to, but no ashtray was provided.