Down one but far from out, AJR gets to “The Good Part” at Pine Knob Music Theatre

Down one but far from out, AJR gets to “The Good Part” at Pine Knob Music Theatre

During its 20 years of performing and 12 years of releasing music, the AJR has taken pride in not repeating itself often. So it was fitting that the 13,000 or so fans at the Pine Knob Music Theatre saw the sibling trio in a new way on Tuesday night, July 29. The basic difference; it was not a trio. Eldest brother Adam Met (nee Metzger) busy promoting a new book, leaving Jack and Ryan — along with accompanists Arnetta Johnson on trumpet and keybo…