As part of the Lincoln Center Out Of Doors series of free summer concerts, Billy Bragg showed up on the perfect summer evening of July 27th for the first stateside occurrence of his 'Big Busk Out' show. Say what now? Yeah, basically, the 'Big Busk Out' concept is that anyone who wants to can show up at the show and play their own instrument along with Bragg and his entourage - if you don't know the cords, that's okay, there are guys standing behind Billy on stage holding up cue cards, making it...