Beacon Hill Village (Allen Hodges and George C from DBRA are involved) (beaconhillvillage.org) - they are working to provide elder residents from around various downtown neighborhoods with opps to socialize, travel, attend seminars, sense of community, etc.
Friends of the Public Garden
BPL branch info
Social service organizations
city council homepage and volunteer/social/membership opps
various items in our footer (e.g., BID, 311, etc)