I am an atheist as well.

[defacto7]

But the Unitarian Church has many different faces. There is quite an anti-atheist undercurrent. One of the heads of the UUC wrote a book that basically pissed on anyone who was a non-believer. You can read up if you wish:

http://www.patheos.com/blogs/daylightatheism/2011/11/can-an-atheist-be-a-unitarian-universalist-part-1/

There are 3 parts including a conversation with the author by the writer of this blog.

The book in question... A Chosen Faith co-authored by John A. Buehrens, president of the Unitarian Universalist Association from 1993 to 2001 and still active.

I'm not sure the UUC is for either end of the spectrum except for individual congregations that fit.