Another thing about religion is that it contains 84% of the worlds population. A critical mind wouldn't dismiss such an overwhelming (albeit declining) majority as totally worthless to the human condition.
The person who discovered smoking causes cancer originally sat on the results of the study for more than a year to expand it's scope because he didn't believe something that the vast majority of the population does could be bad. I say it's quite the opposite. Believing that something has benefits purely because other people do it is a classic sign of a mind that is giving up freethinking making them a perfect candidate to actually follow a religion.
As for calling atheist gatherings religious, that only shows your grasp of the English language. There's no possible use of the word religious which may be invoked in a way that doesn't relate the belief in a deity or following a religion. You would do well to find yourself a different word.