Foursquare users are a helpful lot, especially when it comes to travel. If you find yourself in the unfortunate situation of being stuck at an airport without free Wi-Fi, just ask Foursquare for the insider access. The travel blog foXnoMad points out you can track down a wireless password for an airport just by Googling something like "foursquare Ataturk Airport." Search for the words "wifi" or "wireless" and you should find tips on either where you can grab free Wi-Fi (e.g., inside some airport bar) or the wireless password. The article also points out two free apps specifically for filtering Foursquare Wi-Fi tips: 4sqwifi (iOS) and Venue Spot (Android). It's a good trick to know if that URL hack or just asking for free Wi-Fi don't work. Foursquare also comes in handy for finding free Wi-Fi passwords anywhere else. Source: Get Free Airport Wi-Fi with Foursquare