There is a Facebook group called "Rensselaer, New York" which is looking for members. The goal is to share memories, history, and old photos of the city. They have 56 members so far.
MARCH 29 UPDATE: Wow - already up to 349 members!
Bath-On-Hudson chronicles life in and around the City of Rensselaer, NY (12144) and uncovers the history and technology of a bygone era in Rensselaer County.