Hi,
Sounds like you're looking for traditional irish musicians. There was a Comhaltas Branch when I was there (early '80s) and a session used to occur, as well, at the Spinning Wheel on Tuesday nights. However, this is probably out of date. I just checked "Comhaltas Vancouver" on google and did come up with several leads. This is the home page (which mentions stuff at WISE Hall)
Comhaltas Ceoltoiri Eireann
trust this is a useful lead.
Cheers Rana