“I go dancing when I’m sad, and so does Robyn. From “Show Me Love” to “Dancing on My Own,” “Be Mine!” to “Call Your Girlfriend,” a central part of the Swedish pop powerhouse’s appeal lies in her ability to work out life’s loneliest moments through flailing limbs and shaking hips. It’s innate, the way she can turn her blues into redemptive gold under the dancefloor lights. But for nearly all of this”