Hey All,
For me I think the idea would be (in no particular order) a) share knowledge on techniques and processes, b) discuss prints in a non competitive environment, c) arrange group purchases, and d) socialise with like minded people!

As far as facilities, I don't think a central communal facility would ever work, although I might contact SAPF to see what hey have. Instead I am sure there are enough people with darkrooms (mines almost there!) that would be happy to share their space with people once they get to know them.