The app, called Six Degrees, lets people sign in using LinkedIn. It then uses those LinkedIn profiles to match people who attended the same school or were members of the same fraternity or both simply enjoy wine tastings. According to Fast Company, an early version of the app had used Facebook information to match its users, but researchers decided that the model might pose privacy concerns by circulating Facebook photos and details to strangers staying at the hotel. LinkedIn offered a more private way to match people, while revealing less personal information. Hotels equipped to use Six Degrees will also house a large, interactive screen in their lobbies. When users place their phones on the screen, it will light up based on how many connections they have to other people seated at the table, according to Fast Company. Hotel workers can also use the app to organize group events, such as wine tastings or rock climbing excursions. Get the full story at Boston.com and Fast Company