Sure, lights are important, and this place has 'em. And a perfect surface is a must. Of course, Jefferson Street's are smooth as an air hockey table. And to be in the middle of a neighborhood so you can walk there is vital, as are a couple of practice walls. Yup, they're there, as well as swing sets and a variety of other sly ways to distract the kids while you hone that cannonball serve. But what makes the courts at Jefferson Street really something is a Peruvian expatriate named Max Aracadier, who gives lessons there. The 25-year-old, who arrived three years ago, has students who range in age from 4.5 to 70. His prices are reasonable at $10 to $15 a shot. And he's the nicest, most patient guy you could imagine. "I just love the sport," he says.