Black And White And Schmancy All Over

Was there a dress code? Or do stars just hear "CHANEL Tribeca Film Festival Artists Dinner" and assume through long practice that it's an occasion for black and white?
Julia Restoin-Roitfeld has chic in her genes. And, um, her clothes. Naomi Watts pulls off this kinda-mod, kinda-90s sheath. Whether she can sit…