A group of nonprofessional people who support each other over a problem which all members share
If you can't stay sober you need a support group like Alcoholics Anonymous..
group of people having similar problems who meet so as to give and to receive mutual support
A support group is an organization run by and for people who have a particular problem or medical condition. She attended a cancer support group at her local hospital. A group of people, sometimes led by a therapist, who provide each other moral support, information, and advice on problems relating to some shared characteristic or experience: a support group for cancer survivors. a group of people who meet to help each other with a particular problem, for example alcoholism