Jamming is such fun. It's the easiest way to enjoy the sublime experience of playing music with others. Seasoned musicians will be playing lines to delight us all, but the most of us, we'll be playing just a couple of note, or a couple of chords, for long enough for that to become hypnotic. Then we'll carry on until you start to levitate.
Dave will give signals when you should drop out - & come back in. Some surprisingly satisfying moments will come when you're not playing at all
Almost no experience is required. If you have none, you'll be given a single note or chord, & you'll be doing a lot of listening & a lot of counting. DON'T be intimidated. DO come along. ANYONE can join in. However unmusical you THINK you are.