"It's about race and real estate," Clybourne Park star Crystal A. Dickinson told us, succinctly summing up a powerful new play in just a few words. In Bruce Norris' new dark comedy at Playwrights Horizons, we see a house and meet its inhabitants in both 1959 and 2009, learning the ups and downs of gentrification along the way. Broadway.com recently chatted with director Pat MacKinnon and the talented company of the play, which opens on Sunday and is scheduled to run through March 7.