My experiences were mixed. I found some help in the rooms, but I did find I needed to be a little more aware than the average person who entered their first meeting.
Now I was a strange bird when I was in NA/AA. I am religious but I did not find it helpful for me to work my religion to my recovery. Naturally I fell into the friendships of the athiests.
The only time we were uncomfortable was in meetings that ended in the Lord's Prayer. Luckly, we have enough meetings where I live so I can avoid those, and attend the ones that end in the 3rd Step "prayer".