Folk/celtic jam group looking for musicians

Hi! We're a group of 6 musicians/singers meeting every couple of weeks playing folk/irish/celtic trad. We're currently accordion, violin, cello, guitars and vocals. It would be great if there are any other musicians out there that fancy joining for fairly informal jam sessions, esp. violin, concertina, flute, tin whistle/other wind, banjo, percussion. We play a mix of songs, and classic jigs/reels. We're mostly in our 30s and live around Kreuzberg/South/West Berlin. Open to all levels and ages. It's largely about getting together and having a nice time, with vague plans to organise a regular session slot in a bar/pub at some point. Cheers!