Anyone may attend Open A.A. meetings. These meetings are open to the public and are often held to help non-alcoholic visitors understand what Alcoholics Anonymous is and how it works. Doctors, members of the clergy, and public officials are also welcome to attend open meetings.

Closed A.A. meetings are intended for A.A. members and for individuals who have a drinking problem and wish to stop drinking. These meetings provide a private and supportive space for sharing personal experiences.