Hi all, I still haven't jammed with a band or performed at an open mic night, and I'm worried that I don't have the skills to do so. So I was wondering if I could get some opinions from the more experienced folk here. What are some of the skills and knowledge you need to know for jamming and filling in on an open mic night? What should I have down pat before I offer to sit in at an open mic, so as not to make a fool out of myself? I'm working through Gary Willis' Fingerboard Harmony book, trying to figure out how to perform a walking bass line. But should I concentrate on just hitting root notes, keeping up with rhythm for now? Is that enough, or should I know more? Maybe I need a cool haircut and a more powerful amp? Thanks!