That’s great, for you. I’m glad some people can just be atheists and have it be boring, but think about how that was not too long ago. “I’m an atheist, hmm, guess I’ll spend the rest of my life trying not to be burned at the stake.” Until my lifetime, it meant at least being ostracized. I live in a small town, I have to always think about who I am talking to before I say anything on the subject.
As for groups, one of the big issues of atheism is that, as a group, we aren’t seen as being helpful. That’s not true, but still, if you’re into civic duty, join a group that doesn’t pray at meetings and do something. It doesn’t mean you also have to discuss atheism. OTOH, there are plenty of atheist issues, like helping people in Ghana who are accused of being witches. Check out the Foundation Beyond Belief conference Chicago next month to see a list of issues.
On the non-believer thing, I heard a Hitchens debate the other day. He said, “we” (him, Dawkins, Harris, etc) say the same things over and over. Their position is clear. But you never know what will come out of the mouths of theists. They take the same old arguments and put new spins on them, they lie and call it truth. Hitchens and I find that interesting, but I understand not everyone does.