we don't paint every room at the same time. and keep the room being painted well ventilated, even though we use the zero voc paints. hubby just painted our downstairs bathroom, couldn't even smell the paint, but ventilated the room anyway.
when he paints the kids rooms I will have them sleep in another room for one night to be sure.
on another note these fumes are in our homes even when we don't paint or use any other chemical, they say when doing something like painting it can increase it by 1000 percent.
call me crazy, but I have read a can of paint.
I also wanted to add, even if there was NO chance of health issues from sitting in the paint smelly room, I myself would find it uncomfortable and bothersome. I am sensitive to smells like that and I would have a headache for sure.