Any public serving organization or association such as an NPO or a Residents Association for example, can ask for a forum for their group with their name. The advantage of doing so is that their discussions will be held within the greater community. They can use that platform to get some of their topics noticed by other people living in surrounding areas when needs be by electing to put up a topic for the weekly ‘Most Important Topic’ Poll.
If the “Interest Group’ has a website they can present that forum on their own independent website on a page called Discussions (for example). They can appoint their own admins and moderators and make groups and forums that are not visible to the general public and restricted to only some (or all) of their members.
Here is an example- This website, *http://collabjhb.co.za/index.php/interest-group-forum-example/