In all cases, the identity of those attending the meetings and the content that is discussed at meetings is kept confidential. Some members and guests may be in the closet for personal or professional reasons, and members respect their desire for confidentiality. For example, some larger chapters might break into special interest groups during the discussion time. There might be a group for support, another specifically for youth, another that discusses education issues, etc. It all depends on the size and needs of the individual group.
Many chapters also have presentations at their meetings.
Sometimes there are special guests, who share their experiences or knowledge in a specific area. Other times, a chapter member may lead a general discussion of some issue of interest to the group. Chapter meetings are also a great place to meet supportive people, which are very hard to find in some communities. You can be yourself, without having to worry what people will think. You can ask questions, share your concerns, talk about things you may not be able to talk about anywhere else.