As the emphasis of social networks continues to solidify, Marriott and MIT have begun to reinvent the hotel lobby as a social network. Called Six Degrees, the network matches up strangers in the hotel lobby, when business travelers would otherwise be eating or reading by themselves. The idea is to match people up via background, professional, and personal interests – and it notifies hotel staff, who might organize group activities around the particular mix of guests that week. It’s a socially and technologically forward-thinking method of connecting customers in a new, innovative fashion – and in a professional world built on connections, it’s hard to go wrong trying to facilitate that.