Caroline's tip at Home Is Where. Caroline's tip at Forbidden Planet. Caroline's tip at Jewellery Quarter Railway Station (JEQ) Foursquare Now Seeing A Check-In Each Second. Last Friday, the location-based service Foursquare announced that it was opening their service to be used anywhere in the world.
The following day, they saw the biggest day in terms of usage ever, apparently. This past Saturday, Foursquare was averaging more than a check-in a second, according to this tweet from the official account.