Seth and I went to an open house this past weekend, courtesy of the Greater Boston Tiny House meetup group.  Chris Page finished building his house this past fall, based on the Minim house plans, and he invited 24 strangers to traipse through it throughout the day. We arrived late for the 10:30 start, breathless, navigating our way through piles of snow in a quiet neighborhood.  When we closed the door behind us, the chatter ceased for a moment and we introduced ourselves.  Then everyone talked again, all at once, asking questions and giving answers.  And without a second thought we were friends. I don’t know how these things happen. How does a common passion lead to instant community? But by the end of…