COLORADO SPRINGS, Colo. -- Amanda Zkiab visits The Citadel Mall four or five times a week, but the 25-year-old isn't there to scour the sale racks, stuff herself with food-court goodies or cruise for a date. Zkiab bypasses the shops and goes straight to the Catholic Center, which offers Mass, confession and spiritual guidance in a place where people normally worship couture and pray they haven't reached their credit limit. Even the rosaries are free. "It's so convenient, there's no excuse," Zkiab said one afternoon after Mass. "When I'm done, it's like, 'Oh, I can shop.'" What started as an...