With its 30-minute workouts, no men, no mirrors and no exorbitant membership fees, Curves International (search) is the fastest growing fitness chain in America, helping more than 3 million women stay in shape. But in San Francisco, Curves is being called out over abortion because owner Gary Heavin donates millions of dollars to anti-abortion groups. Ruth Rosen at The San Francisco Chronicle (search) took issue with the pro-life, Christian businessman, writing in a recent op-ed piece that Heavin has given at least $5 million to some of the most militant anti-abortion groups in the country and Curves members who are...