"You actually ask everyone you meet if they are atheist or not? But at any rate, atheists are a minority so it isn't surprising that you wouldn't have met any, especially the ones that advertise the fact."
No, but on Habitat for Humanity build sites there are morning and afternoon prayers. I would think that an atheist would have the integrity to stand aside during those prayers. I have not seen anybody who did not participate.
So, either the atheists there were total hypocrits, or there wasn't any.
Maybe they're just polite?