Can you help me find the right word/s? See details.

It isn’t even easy to give you a two or three word summary of what word I’m looking for. If it were, a reverse dictionary would be all I’d need. It has to do with the sort of cultural center that religion provides in most cultures. The word search stems from my membership in Boston Atheists and specifically the discussion about wording begun by past Boston Atheist president, Zachary Bos. Zachary wrote on the blog an article titled, “What’s a word for atheist church? And crowdsourcing alternatives to ‘interfaith’.”

Zachary goes on to say, “Prompted by a presentation…, I roused myself to compile a list of words which might serve as alternatives to the problematic term “interfaith”. I’d like to ask you to take a look and suggest your own alternatives, and to circulate the URL so as to get as many people as are interested in the topic to take a look and make their own suggestions.”

So following Zac’s lead, I’m circulating the URL. What works better than “interfaith” center when speaking of atheists and agnostics gathering together to better their community and engage in charitable work? Instead of an “Atheist Church”, what do you call the edifice such meetings are held in?