Hi Sean
I am aware that there was quite an active group that used to meet at the Inala Community Art Gallery called the "In Focus Community Camera Club". I am not sure of the group's current status, but I believe that there was a fully functioning darkroom at the gallery that they used to access. The details of the club is listed at http://www.psq.org.au/pages/psq_clubs.htm and you might want to drop them a line to see if they are active or if you can get in the darkroom. I know that Inala is on the wrong side of town for you, but there might not be too many other options.