The full article may be found here.
As described in the article, the "atheists" [whom I assume are mostly just angry former Roman Catholics], gather for announcements, listen to platitudes about compassion, have their secular politics ratified, and sing innocuous music from the popular realm.
Seriously, how is that different than some northeastern Protestant church? This really isn't a surprise, as the times that I've spent in Congregationalist churches and some Episcopal [and Presbyterian, Methodist, Lutheran, etc.] could almost pass for an atheist "church". They merely are extending the trend away from powerful Christian witness that has been started by contemporary mainstream Christianity.
Let's see how many stick around for the passing of the plate.