Grindr

Grindr is a geosocial networking application for certain makes of mobile phone. Grindr allows to find other users within close proximity.

It was initially launched in the USA in 2009, but as of June 2012, London topped the list of cities with 350,000 users, and the local system crashed, possibly as a result of the arrival in London of Olympic athletes British users increased by 30,000 in 2009 after Stephen Fry mentioned it on the TV show Top Gear.