Charley, I have a friend in Sydney who fixes up and sells banjos... he might be able to help you out... drop me a line and I'll give you an address.....the loaded dog isn't really a session as much as a "sit down and be entertained" folk club... although you might be able to get a floor spot.....
the one I run Toongabbie Music Club does have a session... there are details of other folk clubs etc. at the Folk Australia site
slainte
alison