From left: Amber Tiara (Maureen) and Rosie Byrne (Deena) in Open Fist Theatre Company's "Brownstone" at Atwater Village Theatre (Photo by Erin Clendenin) Catherine Butterfield's "Brownstone," having its Los Angeles premiere by Open Fist Theatre Company in the Atwater Village Theatre, is an exploration of city living in three distinct stories set in the 1930s, 1970s and early days of the new millennium. Set in a classic New York brownstone, each story follows a young couple na