Song Sung Blue It would be hard, for me at least, not to like Song Sung Blue, a jukebox musical about love and family set against the backdrop of working-class show business. It’s based on the true story of Mike and Claire Sardina, small-potatoes entertainers who launched a Neil Diamond tribute act together they called Lightning & Thunder in Milwaukee in the ’90s. Charismatic performers, they built their own regional following, eventually packing houses, playing...