When I went to groups, the Nar-Anon group was VERY small, sometimes only 3 people, never more than 8, only ran once a week, and the woman who ran it just loved to hear herself talk. Lots of Al-anon groups, some of the HUGE.
I am not a group person in general, and while my husband was using, I was way too cranky to be around people who annoyed me (which was everyone, at that time). SR saved me.