About 14 in my homegroup of 140 or so are Christian. All of them are in the under 25 year crowd, the longer term people with 26 to 48 years are all non Christian. No one cares what anyone else's specific beliefs are, or wants to hear about them.
If Christian beliefs were required then the alcoholics in non Christian countries would be pretty well screwed, but the program works just fine there too for the willing.