Hawk one
Emperor of the Internet
No member of any organisation that's particularly atheistic. Not sure there are such things around here, it's mostly about secular organisations. Closest thing I can think of right now is that we have "Human-Etisk Forbund" (Human(e)-Ethic Foundation). You don't even have to be atheist to join that group, you just have to agree that for example religious indoctrination should stay out of science classes. And that it's a pretty damn good idea to act honestly and ethically, of course.