Four years ago for Valentine’s Day, Chairman Mao recorded this soul mix as an installment of his now defunct Spine Magazine radio show, “Spine Blowing Decisions.” It’s a collection of some classy ’60s and ’70s crossover soul 45s – most of which share the distinction of being melodically catchy, but lyrically largely about heartbreak, doubt, and/or misery. Feeling blue on V-day? We got you...