HOUSTON CHRONICLE - Sep 16 - Hinge launched in Houston last month. The dating app mostly matches users with their second- and third-degree connections on Facebook. Other sites and apps are taking the same route. Coffee Meets Bagel gives users a single daily match culled from their extended Facebook network. SparkStarter, which launched earlier this year, lets users match up with friends of Facebook friends. Even Tinder has a Facebook component that reveals whether the users know any of the same people. Connecting over Facebook takes away the relative anonymity of online dating.