Business: Pas de Dough

The lights go low at Manhattan's garish Latin Quarter nightclub. Onto the stage glides a slim-hipped, broad-shouldered man in white tie and tails. He grasps his partner, a stunning redhead in black tights, whirls her over his head on one arm, hurls her dramatically in a split-legged fall to the floor. The dance team is Nicholas Darvas and his half-sister, Julia, one of the top acts in the U.S. What the tired businessmen watching the show do not realize is that Hungarian-born Nicholas Darvas, 39, is a better moneyman than most of them; he...