Check out the local Irish Pubs and ask the locals when and where the next sessions are. I can't tell you too much, as I haven't gigged the IP scene in years. There used to be a couple in Bochum though. I think there was a Paddy Murphy's and a Buck Mulligan's. If you come down to Köln (about an hour's ride to the south) you can PM me. Have a good time.