NEW YORK (AP) — When 72-year-old Michael Roper rides his bicycle to and from the pub he owns in Chicago, he can't imagine a better way to commute. He's getting exercise, drifting through fresh air and catching glimpses of neighborhood life — a recently opened coffee shop or a diving owl at night —that he's convinced he'd miss if he were driving. If you’ve considered bike commuting but assumed you needed expensive gear and to be in excellent physical shape, or worried about arriving at...