Mason Wartman, the owner of Rosa’s Fresh Pizza in Center City, thanks a customer in his pizza shop on Wednesday, January 14, 2015. Wartman, a former Wall Street equity researcher, doesn’t just sell pizza. He is also a social entrepreneur, giving back to the community by feeding the poor and offering free t-shirts and crew-neck sweatshirts in conjunction with Rush Order Tees. ( YONG KIM / Staff Photographer )