Gee, thanks for the links. I knew it must have some scientific prinicple behind it, and the moving car thing seemed pretty obvious. But the effect stops if you open all the windows all the way, so I figured it had something to do with the equalization of air pressure or something.
The bar thing really drove me nuts, and it's what annoys me most about fanatical anti-smokers. They are just totally immune to facts at all. The bar owner, Mike, just hated smoking. Here's a guy who made part of his living off this bar, which was such a dive that the regulars would be standing outside the bar at 7AM waiting for Bernie, the bartender, to open every day. That's the kind of bar this was.
Before we telephone girls invaded the place during the strike of '89, the regulars were all older men. Mostly retired or getting government checks for some reason. Check day was always a busy day at the bar. I worked 7:30 AM to 4 PM and I used to park my car across the street from the bar and there were many days when I'd see the guys standing around waiting for Bernie to show up.
I tried to show Mike that cracking the door just a little made the smoke leave. But he didn't care. We'd be sitting there, freezing our asses off, with smoke just hanging in the air, and if he'd would have just closed the door for a few minutes and then cracked it open an inch, he wouldn't have smoke in his face and we wouldn't freeze. But he didn't care, he wanted us to freeze. He was a real asshole about it.