I was an atheist when I attended my first meeting.
I took offense to all the God stuff I heard. I stayed because I had nowhere else to go and only because I was constantly reminded that I did not have to believe in any God to remain a member.
I kept an open mind.
I no longer consider myself an atheist but then again I still do not align myself with most of the beliefs of western religions (or any other religion for that matter)
I do believe however that there is a universal singularity common within all matter and energy that is the creator of all life and from which thought originates.