Let's set the scene: there's a regular on his barstool, beer in hand. He's watching a young couple execute a complicated series of moves on the dance floor, while at the table in the corner the DJ adjusts his headphones and slips a new beat into the mix. These are all experiences created by a given scene--one where we feel connected to other people, in places like a bar or a community center, a neighborhood parish or even a train station. Scenes enable...