Live-Event Artists Paint Right There A wedding on a TriBeCa rooftop by Katherine Gressel. Ms. Gressel, who lives in Brooklyn and works at an arts nonprofit group, stumbled into event painting four years ago; her business has grown steadily since she started advertising her work last year. "A painting is able to capture the overall essence of the event," she said. Plus, "there's a limit to how much you can decorate your home with your wedding pictures."