Out here on the left coast those are usually "Question and Answer" meetings for newcomers. They hand out meeting directories, phone lists, a handful of pamphlets, and read some of the introductory material from al-anon.
The al-anon website has a packet you can order with the full format for those "introduction" meetings. It's hard to find due to the large volume of material they provide, I'll see if I can dig it up.
Mike
