Yale

Launched in 2009, Tripping.com was created to connect travelers and hosts for homestays around the world. Now, perhaps to assuage anxiety about staying with total strangers, the company has introduced Networks — groups that link Tripping users via shared interests or experiences. A Network can unite anyone from Yale grads to yoga enthusiasts, ensuring that you can find a Tripper with whom you share at least one commonality before you crash on his or her couch.