"The "Irish Pub" in the Europa Center is to be avoided. They have music, but IMHO it's the "McPaddy" variety. How many times can you hear "The Irish Rover" in one night? There are (were, anyway) a couple of good places in Kreuzberg (names washed away in a river of beer) w/ good, sincere folk music. Check in Mitte/Prenzelb'g- that seems to be where a lot of the nightlife is migrating in the "new" Berlin. Also check "Zitty" (magazine that lists the happenings in Berlin) for inspiration. Viel Spass.