By now, most of us have heard about Boston 311, the initiative launched by Mayor Walsh two years ago to make it easier for residents to report non-emergency issues such as potholes, missed trash collection and graffiti by simply dialing 311. Dan O’Brien, Assistant Professor of Public Policy and Urban Affairs and Criminology and Criminal Justice at Northeastern University and co-director of the Boston Area Research Initiative, will talk about what we can learn from the many reports the City receives and archives. He’s done a considerable amount of work leveraging these reports as “the eyes and ears of the city,” tracking physical disorder (i.e., “broken windows”) across space and time; and looking at the ways in which community members express custodianship for the urban commons, by voluntarily attending to street light outages, potholes, and other issues that are everyone’s problem but no one’s responsibility. Meet at King’s Chapel Parish House, 64 Beacon Street, at 5:30 p.m. for light hors d’oeuvres and wine; program begins at 6 p.m. BHV/BHS members: Free. Guests of members and prospective members: $20.