I think atheist is a strong term. Like Terry said, we don't know what might be out there. But I'm close to atheism. I guess the term would be agnostic. I do know the Bible (and all of the other religious books) aren't the product of a more intelligent mind. And I call BS on their fables.
That said, I'm "out" to the people I can be out with. Friends who aren't judging on the basis of religion. And have religious friends who are perfectly comfortable with atheists. I don't know exactly what affiliations my co-workers have. I know one is at least semi-religious and talks about voluteering at church. Don't know about my boss or others. At work, I don't declare any position. If anything, I'm just going to dodge the issue. I think I said once that "I grew up a JW, but I'm not one anymore" and left it at that. For all they know, I'm a fundie now.
There are people I can't be "out" to. They see everything in terms of God or the Devil's side. And my beliefs put me on the devil's side. I do hope they wake up.
My kids are split. My son openly admits to being an atheist at school. Maybe that's why he doesn't have so many friends. He really appreciates that one of his friends is too.
My daughter fakes it. I teach her Bible stories so that she knows the gist of it and can fake it. ...with added commentary. She has so many religious friends. She even goes to church with them sometimes. And has fun. Not like the JWs at all. Mostly games. But this is what she has to do to fit in.
I sometimes wonder if she's faking it. If her mom has her brainwashed and is lying to me and really into it. But she loves watching the atheist cartoon videos on YouTube. She'll just plunk down in front of a PC and watch a whole channel's worth of atheist videos. So I don't think she's lying to me. Either way, at least she's seeing both sides and can make up her own mind which way to go.
Ex wanted to start taking the kids to church once. I was opposed but conceded that while they're with her, that's her decision. But I don't want them going to church. Luckily she's been too lazy to take them.