Tired of staring out your cubicle at the same boring faces every day? For a welcome change of perspective, take your lunch break at this Public Square deli. You'll need a mouth as big as Steven Tyler's to take a bite out of one of their hot, juicy corned-beef sandwiches, blanketed in melted Swiss. But the real draw is the panoramic view of the square, an ant farm at the intersection of squalor and swank. At lunchtime, grab a seat at the plate-glass window and you're guaranteed a show. Lawyers in herringbone suits power-walk past harmonica-playing bums with Styrofoam cups. A weary, gray-haired woman serves up dripping wet brats and small talk under the shade of her umbrella. Rich housewives with pink-tinted JLo glasses and Louis Vuitton handbags leave Tower City carrying bags from Nine West and Godiva. Don't stare too hard, though - they can see you too.