Yes, I‘ve finally found it in the lovely oldtown (Altstadt) centre of Bonn with its characteristic charm and architecture, artists and performers, clubs and pubs. I found some 100 yr. old craftsmen premises formerly run by the Heinrich Hermanns family and now generously open by landlord Erich Krupp and his wonderful wife Birgit, for a small bunch of artists which I gathered together to occupy the spacious area. 
Come round and pop in at our group ‚DORO101‘  in the Dorotheenstrasse 101, and encounter a broad variety of artists.