Dating Services, Social Networks and Bluetooth
Really, this is just a cross of the trend that Manuel spotted on social networking services turning into dating services, with the social effect André already noted about bluetooth-enabled phones in bars:
in New Scientist via Eurekalert
YOU might pass the love of your life in the street and never know. But what if your cellphones had exchanged photographs and a few crucial details that suggested you were a match as soon as you were within a few metres of each other?

