[Sherman Logan]

But then the air from the bathroom would be sucked out, instead of the air from the outside being sucked in.

Not really. Air flow direction is a result of pressure differential, created by air in vs. air out.

The door swing direction is essentially irrelevant.

[vietvet67]

Shucks. I was looking for a little help in keeping the smoke cloud from exiting in a no-smoking establishment. :-)