I'm so sorry the NarAnon group disbanded. I love mine!
I do attend AlAnon as well and have found in my AlAnon group more folks really "working" their program, more attendees and with more experience (years attending) in the group. And a handful of parents (like me) rather than spouses.
I've attended a few CoDA meetings, but haven't stuck with it - too far away, no transportation, and don't want another evening meeting now - the 2 I do are enough right now. But I did feel comfortable there as well and think in the long run it would benefit too.
I think all are accepting with common enough experiences to make it worth attending. Good luck whatever you decide to do.