The man with the coolest name in contemporary rock music drew the largest crowd we’ve ever seen at the Rock and Roll Hotel last night. Keep in mind that it was a Wednesday. John Vanderslice also completely demolished the “fourth wall” between the audience and the stage, handing out Mrs. Field’s cookies, inviting a gaggle of fans to the stage for a sing-along of “me and my 424,” and descending from the stage to play…