In private chat, you can share your current location, pin-mapped.

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Because Codiqa couldn't add a customized GPS feature to pin the location of the trees, or a photo uploading capability to capture images of the trees, Mr. Brown turned to W3Schools.org and HTML5rocks.com for online tutorials.

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And sometimes, as is the case with the increasingly prevalent mobile supper clubs, you might not even be able to pin down their location.

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The first Pins will open on May 29th, with the Pin 5 (a 5-by-5 meter indoor location) making temporary appearances at Spitalfields Market, Westfield and White City, while the 7-by-7 outdoor version (Pin 7) will pop up in the Olympic Park along with Hyde Park at a later date this year.

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