The author joined a group workout class because she loves swimming. Courtesy of Rochelle Nataloni For years, swimming laps was my favorite activity, but then my favorite pool closed. I reluctantly tried something I'd always avoided: a group water aerobics class. I expected a workout; instead, I found new friendships and a more hopeful view of growing older. I've always felt most at home in or around the water. Sometimes that meant swimming laps in a gym pool with waterproof headphones on and m