I know that there are atheists who have realized that they are missing out on religious community, and they are trying to establish similar communities but based on more skeptical scientific materialist principal. It's a brand new endeavor, and we have yet to see if it works out. My suspicions are that without the creative spiritual imagination they will lack the glue that makes it all stick. However, if they succeed they will be happier and healthier people, and so I do wish them the very best.
I think one of the problems is that atheists don't really have a specific spiritual identity--it's extremely difficult to build a community/coherent sense of your spiritual self around a lack of beliefs.
I can definitely identify with atheists who enjoy the sense of community that comes with being religious... it's extremely difficult to exist in a vacuum, or in a purely solitary fashion where your beliefs are so tailored to your own inclinations that you couldn't possibly 'click' with anyone except in that you both reject organized religion.
I wouldn't even know how something would begin to qualify as 'atheist art'... but on the other hand, with something like music, I'm not completely sure that it is
ever inherently religious-- the lyrics can be religious, but most of religiousness attached is a product of conditioning. This probably does color your experience of the music... but I'm not sure that there isn't a point where music always inevitably becomes something more universal... as you were saying, something beyond what its creators, or even its performers intended. So yeah, I
might argue that the concept of 'religious music' is actually only interpretation after the fact.
If a group of atheists broke through the stigma and gathered together to perform a 'religious' piece (changing the lyrics, of course), would it still be religious? Would it sound terrible? Or would it be pretty much the same thing? Would the context, or the fact that it was suddenly about giving your dog a bath make it less beautiful? I don't think that music necessarily has to celebrate anything... it can be about itself, or maybe about something that can't be articulated.
I could also argue that religiousness/irreligiousness translates best to media where the creator retains a larger degree of control over the interpretation of the final product. The film 2001: A Space Odyssey is, for me, an example of truly transcendent, irreligious art. Kubrick was an atheist and yet he obviously recognized a very visceral form of beauty in experience itself... the entire film can be read as an ode to/celebration of science and the universe. But of course, it's still ambiguous enough that you could interpret it religiously-- so yeah, I guess the trouble is that if you were to make it any more direct, it would probably suck.
A lot of true science fiction (the non-action kind) could be read as atheistic... though I suppose literature is actually the
most solitary art form. Jorge Borges (agnostic, but still) is probably my favorite author, along with William S. Burroughs... and both of those authors embrace the weirdness and confusion of just being alive-- you can have moments of transcendence that are continuous with banality, or completely insane juxtapositions of profundity and nonsense
without reaching for a religious explanation...
And I'm enjoying this conversation too... I'm actually starting to think about things.
PS: I love the 7th's second movement-- absolutely gorgeous... very somber though.