Alice Barker was a helluva chorus-line dancer in the 1930s and 1940s, and according to this YouTube description, she moved at clubs like The Apollo and Cotton Club while also working in films and TV.

When Tamia came across a video on YouTube of people line dancing to her 2006 song “Can’t Get Enough of You,” she and her husband, NBA legend Grant Hill, decided to join in the fun and learn the dance.

One recent Wednesday night in Atlanta, dozens of people gathered in a studio space armed with water bottles, hand fans, towels and an expectation to be in sync. There were hugs among the regulars ...