Heidelberg was in the middle of a big cultural festival connected with the university, with concerts, theater performances, lectures, and recitals happening almost every other day. The apartment I stayed in was on Theatrestrasse and adjacent to the main hall, housed in a modernist architectural style that was at odds with its surroundings but which let in lots of light.
I noticed a poster for Irish/Celtic music scheduled for the Saturday I was in town and was able to hear a band called “The Outside Track.” 4 women (from New Breton, Canada, as well as Scotland, Ireland, and Northumberland) and one guy, originally from Germany and now in Ireland. Very fine tunes, muscian-ship, and general dynamics on a small stage in a hall that held around 100 people sitting cheek-to-cheek.
Here’s a short video (2’42”) of one of their more lively tunes. http://www.theoutsidetrack.com/media/