With the Foursquare update, Android 4.0 users with NFC phones can now share their lists and the venues they have visited with a friend just by tapping phones. Users can now tap phones to initiate friend requests or tap their phone against an NFC tag or poster to check in.

NFC, or near field communication, allows devices to exchange data over short distances, typically with a wave or a tap. In Foursquare Android update, NFC support has been added for the app Venue, Lists and Me pages.

On Android, NFC support has been rebranded for marketing purposes, and is called "Android Beam." The touch-to-share functionality lets NFC-enabled Android phones share information between each other, including contacts, web pages, and videos, for example.

Foursquare [Market]