David Yurman is reserving its store space tomorrow night for festivities in honor of the Cattle Barons Ball for the American Cancer Society. The store will hold about 75 mingle-ees with cocktails and hors d’oeuvres in hand, who are scouting the scene for a new rich boyfriend bracelet. No RSVP necessary. Just show up tomorrow night, grab a drink, and purchase some jewelry. Or don’t. But if you do, a percentage of your buy will go to the Cattle Barons Ball. David Yurman NorthPark Center. Wednesday, May 5 from 6 pm to 8 pm.