“Another live album by a jazz quartet playing Great American Songbook tunes? Er, well, up to a point. There are certainly eight vintage standards here, along with a bebop classic and two originals, but I wouldn’t recommend any of them as singalong material. With Ethan Iverson at the piano, any session is bound to be an excursion into the unknown, or at least the unexpected. He has the knack of maki”