searching for overtone singers in Frankfurt am Main & Offenbach

Hi, I am looking for overtone singers, in Frankfurt am Main & Offenbach, for a weekly wednesday Overtone-Jamsession-meeting! If interested pls. write to Norbert.Esch@t-online.de
Some examples what we do, can be found here:
https://www.youtube.com/watch?v=F6dW-q0sIq0