A comment on my previous post brought up the very good question: why closed meetings?
A closed meeting is a meeting in which anyone who has a desire not to drink that day is welcome. It doesn't matter if it's your first meeting or your thousandth. Doesn't matter if you desired to drink the day previous, or you'll be drinking the next day. It doesn't even matter if you'll drink right after the meeting in question. All one needs is the desire not to drink to attend a closed meeting.
An open meeting is open to the public. While that sounds nice and fuzzy, let's remember who makes up the public: ex-spouses, bosses, probation officers, reporters, nosy neighbors, in-laws ... in short, all sorts of folks you might not feel comfortable sharing in front of. They do not need to have a desire not to drink, just a sense of curiosity. They are not bound by the traditions of anonymity. Alcoholics who are deeply concerned about their own anonymity may choose not to attend open meetings for this reason, and that's their right.