Atheism is LEGALLY a Religion in America & Marriage is not just for a Man and a Woman.
I just want to point a few things out. First, I know Atheists don't want to hear this, but as far as the US Supreme court is concerned, Atheism is a religion. Look up the "I AM" Supreme Court case to find details. So all of you looking to get Atheist Chaplains, this is all you need to know to get that done.
Atheism is a religion, meaning, any Atheist organization established before the RFRA (in the 60s) is a Church. This may include American Atheist, but I think they are 50 years old, so they might have just missed the cut off. So I am not sure if they have religious rights, but they are still practicing a religion as far as the law is concerned.
Atheists probably don't like the fact that they are a Religion, but, this means you can pass out Atheist literature at schools, and even become an Atheist Minister. You can choose to SAY you are not a religion, but you are a religion.
If you join the Universal Life Church, you can even be an Atheist minister. And start an Atheist Ministry. This means you can may gay or lesbian couples, some states even allow people to marry animals I think, but I have not researched it so I don't know. The Universal Life Church was established before the RFRA, so they are not only considered a legal religion, but a legal church. So anyone in a group like American Atheist would have to join a church like that to get their full religious rights.