The first secular AA meeting specifically for atheists and agnostics was held in Chicago. Quad A began meeting in 1975, and is still going strong today! Visit their website and read what the Chicago Tribune had to say about this groundbreaking group.
Quad-A is the most common reference for group meetings attended mostly by atheists, agnostics, and humanists; however, anyone with a desire to stop drinking is welcome.
Quad-A meetings function no differently than other A.A. Meetings—allowing recovering alcoholics to gather on a regular basis as autonomous groups using the suggested Twelve Steps for the individual and the Twelve Traditions for the group as the foundation for recovery and spiritual growth. We share and learn how to live sober and rewarding lives. Like all A.A. Meetings, Quad-A meetings are for all people with a desire to stop drinking. There are no further qualifiers or disqualifiers.
“To us, the Realm of Spirit is broad, roomy, all inclusive; never exclusive or forbidding to those who earnestly seek. It is open, we believe, to all…” (Alcoholics Anonymous, p. 46).
Quad-A acknowledges recovering persons may have a valid and fulfilling sobriety with or without belief in a Higher Power as traditionally understood. For many regular Quad-A meeting-goers, the “Power greater than ourselves” and “God as we understood Him” are interpreted by the individual or ignored altogether. For some of us, it is A.A. itself or the group. Our members have been reared with and without many different forms of religious training; we prefer to refrain from proselytizing for or against any particular creed. We accept the beliefs of the individual without contempt, condescension, or approbation.
Source: http://quadachicago.org/