The white Queen infamously told Alice "The rule is, jam to-morrow and jam yesterday – but never jam to-day." So here's a Jam from yestidday.
Through the years some venues were famous for jazz, blues, or rock jam sessions. San Francisco's Warfield comes to mind. So does The Keystone, both of them, for there were two, both famous for hosting jam sessions. Merl Saunders’ 1973 "Fire Up" album featuring Garcia and Fogarty started out life as a Keystone jam, 5 bucks cover and 2 drinks minimum. Speaking of which: