Meeting Styles
Open Meetings: As the term suggests, meetings of this type are open to alcoholics and their families and to anyone interested in solving a personal drinking problem or helping someone else to solve such a problem.
During the meeting there is usually a period for local AA announcements, and a treasurer passes the hat to defray costs of the meeting hall, literature, and incidental expenses. The meeting adjourns, often followed by informal visiting over coffee or other light refreshments.
Guests at AA open meetings are reminded that any opinions or interpretations they may hear are solely those of the speaker involved. All members are free to interpret the recovery program in their own terms, but none can speak for the local group or for AA as a whole.
 
Closed Meetings: These meetings are limited to alcoholics. They provide an opportunity for members to share with one another on problems related to drinking patterns and attempts to achieve stable sobriety. They also permit detailed discussion of various elements in the recovery program.

"Anonyme Alkoholiker" in Germany
The German speaking General Service Office in Germany