Tennis rackets, snowshoes, kayaks, swim goggles, hockey sticks, croquet mallets: Paragon stocks virtually everything any athlete needs, no matter what the sport. It keeps up with the trends (heart-rate monitors) and doesn't neglect the old-fashioned (Woolrich shirts). Subway: L, N, Q, R, W, 4, 5, 6 to 14th St./Union Sq.