A little-discussed fact about tennis is that it's one of the cheapest and most accessible sports out there. For about a $30 investment, you can buy a brand-new racket, a set of tennis balls and pass unlimited hours on a free, public tennis court. Dallas alone has hundreds. Among your best options are the courts at the Dallas College Eastfield Campus just across the Mesquite border. There are 10 new courts, and even on a rare, cool Saturday morning, they're almost always unoccupied. All the better for first-timers, who can have fun getting a feel for the game free of watching eyes.