In Acoa we are there because of the trauma that parents did to us growing up, whether through their alcoholism, depression, mental illness, abandonment, physical abuse, drugs, etc. The common denominator is trauma while growing up.
In Alanon, the common denominator is any friend or any family member.
So as you can see, acoa's are there specifically because of their parents.
So when you go to alanon, most, if not all, are there for spouses and children, so that's what most 99% of why they attend.