A person does not have to be alcoholic to attend meetings. See below for a description of meetings. AA meetings are designated Open or Closed. Anyone may attend an Open meeting of Alcoholics Anonymous. Closed meetings are just for those people who consider themselves alcoholic or who are trying to decide if they have an alcohol problem.
Meetings vary in format as well.
Some are Speaker meetings, in this area called Lead meetings, while others are Discussion. At some meetings, those who listened are invited to offer a comment to the speaker at the completion. Discussion meetings follow a variety of formats. At some, the person chairing the meeting will suggest a topic. At other meetings, those attending may offer a topic or problem for discussion, and at still others, discussion will be based on a reading from one of the AA publications.