Not sure how many concertina players there are in the Berlin area, but if there are more than the one I know, they might like to come an listen to us on Saturday evening:
http://www.kammermus...rtkalender.html
After that we're playing a house concert in Berlin on Sunday 23rd (send me a PM if you'd like to come) and we move onto the German Meeting the following weekend.
http://www.concertinas.de/treffen.htm
We're also playing again at the Trossingen Hochschule on May 3rd:
http://www.mh-trossi...staltungen.html
Adrian