The timeless Green Mill earned its notoriety as Al Capone's favorite speakeasy (the tunnels where he hid the booze are still underneath the bar). Sit in one of the curved velvet booths and feel his ghost urging you on to another martini. Local and national jazz artists perform nightly; Sundays also host the nationally acclaimed poetry slam. Cash only.
FYI, Capone's designated booth is the one at the end of the bar, on the north side – the only seat in the house that has a view of both doors.