The Folk scene in Perth tends to be House based with lots of "House" Concerts. There are some Clubs but they are few and far between Try contacting "Little Folk Inc" a childrens cancer charity, they do lots of such events. Graham Pirt did some last year.
Ken Kenny is the contact as in Enda Kenny's big brother. These house concerts really are a very good evening.
Good luck! Contact me if you are having trouble finding the people.