max
Out to lunch
IMO the easiest and best solutions. I know a woman who's hooked on e-cigs (the traditional nicotine type) . She has one hanging around her neck in a pouch, ready to hit, anytime she's not in bed or the shower. She'll take a drag anywhere, evan in public school classrooms. But in locations like that, where someone may see a vapor exhale and question her about it, she just takes a drag small enough so that she can hold it long enough to eliminate any visible vapor on exhale. For really good odor elimination, holding your hit even longer may be advisable, but there's no question that small, manageable hits are the best way to go.I think that it is safe to leave a window open and I think it helps to replenish fresh air quicker into a vape room faster than if the window was closed.
Also a BIG tip that I can suggest is hold the vapor in as long as possible. You will basically absorb as much as possible and when you exhale it wont smell as badly as if you just took a huge quick hit and blown it all out. I do this every time and as I said I have had no needs to "sploof" anymore.