The Casual Cool Quartet: (Left to right) Rich Sommer on the basics: "You put on a T-shirt, then a button-down, then a sweater. That works." Jay R. Ferguson: "[Mad Men] has helped me get a little bit of style in my life where there wasn't any before." Ben Feldman on his character's frumpy style: "You never want someone to come up to...say, 'Oh, you dress like that in real life.'" Aaron Staton: "When the occasion arises to dress up, I enjoy it. That wasn't the case before [Mad Men]."