...the whoosh of energy, the rush to the dance floor, then up to the front of the stage — hips shakin’, fists pumping and voices singing. Audiences of every age and description do it — eight-year-olds at charity walks, 20-year-olds at university-town bars, boomers at classic rock nightclubs, 60-year-olds in gowns and tuxedos at weddings and corporate parties. Can you still sing along with Journey, Black-Eyed Peas and Lizzo songs when you’re 60?  Oh yeah, baby.