hmmmm....i guess you just call up some friends and say "hey--comeon over" I play guitar and so do many of my friends, but usually people just show up with drums or penny whistles or anything and sometimes we use what's around the appartment to make beutiful music...i think you just gotta get the the word out about it (btw, rise up....is my absolute favorite book...it's practically our bible)...oh yeah--it helps to have food around too....