I like the term “working group” for a group that’s focussed on a topic, particularly if it’s probably not going to go on indefinitely, and in that vein there’s now a wg-blockrelay group/category for discussing expanding the number of block-relay-only connections bitcoin core peers make/accept cf #28462.
Combining a category with a group makes it possible to:
- make a private category, with posts only members of the group can see
- make a read-only category, where only group members can post, but anyone can read the posts
- make a public category, but allow group members to moderate it, rather than restricting that to the global moderators
- make it so group members automatically watch the category, so they automatically get emails notifying them about new topics/comments in the category, but not get spammed with everything else going on on the site