The band known as Affinity only released one album but the 1970 release on Philips’ Vertigo imprint has long been a favorite of crate-diggers for Linda Hoyle’s distinctively powerful voice, Lynton Naiff’s Hammond B3, Mike Jopp’s guitar, Mo Foster’s bass, and Grant Serpell’s drums and percussion.  The quintet came together in an era where jazz-rock thrived, stretching out their songs and adding brass and string accents for an extra punch.  Late last year, Cherry Red’s Esoteric Recordings imprint reissued the self-titled Affinity as a greatly expanded 4-CD edition drawing on recordings from…