Atheism for the devout?

The reason I'm an atheist is that I don't believe in God. It's the only reason - being both a necessary and a sufficient condition of atheism. All the same, I do consider it one of the advantages of being an atheist that I don't have to spend any time (leaving aside weddings, bar mitzvahs and funerals) in a place of worship. I don't find 'godlessness... a little scary' and I don't want to be participating in an exercise in which I have to utter this sort of thing:

Where is my light?... My light is in me.

My light, such as it is, comes through the window or else gets turned on with a switch on the wall. More loosely, my light is what I've learned: from experience, from books, from other people, from thinking. So, it isn't clear to me why atheists would want to '[experiment] with building new, human-centered quasi-religious organizations'. Less clear still is it why they would want to be 'part of a religious group' - indeed how they can describe themselves as atheists and want this. And why form 'churches just for atheists'?

If the answer is something to do with getting together with others, or with people with shared interests, values and beliefs, there are lots of different ways of doing that than in a church-like venue, and with church like-rituals. Not that I have any objection to anyone doing this if they want to; I just wonder about it, is all. (Via.)