It grew out of the stereotypical joke about what Jewish folks do on Christmas Eve: "We stay home, watch reruns of It's a Wonderful Life, and eat takeout Chinese food," says Corey Kronengold. He's the national spokesman for the Matzo Ball, an event put on for the past eleven years in various U.S. cities by the Boston-based Society for Young Jewish Professionals. It was created by society founder Andrew Rudnick as an alternative to TV trays on Christmas Eve. This year the cocktail party, hors d'oeuvres, and dancing for Jewish singles age 21 to 45 takes place in six cities, including Boca Raton and Miami Beach. The Boca version happens at Club Boca (7000 W. Palmetto Park Rd.) and features entertainment by DJ Remix. In Miami Beach, nightclub Amnesia (136 Collins Ave.) hosts. Tickets cost $15 in advance, $20 at the door. For reservations for either location, call 888-633-5326.