Dublin - Hughes' Pub by The Four Courts. The Cobblestones (?)
The Goílin Club - (At The Teachers Club, Parnell Square - Friday Night)
The Clee Club (Liberty Hall - Tuesday).
You could do worse than drop into The Piper's Club, Henrietta Street - they should be able to fill you in with details (and give you the grand tour of the building).
Galway - The Crane Pub - most nights and Sunday afternoon.
Inis More - Don't know, but it's easy to find something on an island that size - give us a wave; we can see it from here.
Enjoy,
Jim Carroll