You just have to be there. Round About Monk is Özgür Cakir on bass (on the chair), Matthias Schubert (on piano) and Max Luettich (with the peace pipe, on drums) (all pictured on the cover of your Th. Monk Underground record. If you don't have the disc anymore, look it up at
http://www.mampf-jazz.de/programm.html