A quarter-century ago, guitarist Eddie Roberts joined forces in Leeds (that’s a city in the U.K., my friends) with drummer Simon Allen, bassist Pete Shand, and keyboardist Bob Birch. Birch was replaced by Joe Tatton in 2007, and Tatton remains in the band to this day. Now, with over a dozen studio albums under their collective belts, the mostly-instrumental jazz-funk quartet is on tour to celebrate their new record, the not-ironically named “Old School.”