I wonder if those are partly not better suited for tasks that we keep on github: Events/Finding a location (a task), collecting tools (should go in our resources). Projects may be like design advice (what @evalica suggested here ) (but maybe you intended these to be something different, I’m only guessing from their names)
Help and Exchange may be broadly what I assume discourse to be particularly good at. Thus, my suggestion above of having broadly topic oriented channels:
I’d be happy to refine and/or combine 
(e.g.Disciplines + Design Advice + org-like category)