London Twestival

Wigs were all the rage among many of the Twestival-goers, especially those who packed into the main room. Photographer Jon Cartwright has donated his fee for the use of these images to charity:water Photograph: Jon Cartwright/Jon Cartwright

Even a broken leg couldn't keep twitterer @grumblemouse from Twestival. Meanwhile, tweeters could return to old-fashioned pen and paper on a "physical Twitter homepage" (aka a whiteboard) Photograph: Jon Cartwright/Jon Cartwright

In spite of the emphasis being on networking and chatting, many preferred to dance the night away Photograph: Jon Cartwright/Jon Cartwright

More money was raised for charity:water through an auction and a raffle Photograph: Jon Cartwright/Jon Cartwright

Twestival organisers Tim Hoang, left, Ben Matthews and Tom Malcolm prepared the venue before the onslaught of twitterers Photograph: Jon Cartwright/Jon Cartwright

Guitarist Joe Driscoll sets up in the cavernous main room Photograph: Jon Cartwright/Jon Cartwright

Some twitterers even went as far as to wear specially-designed T-shirts to the event Photograph: Jon Cartwright/Jon Cartwright

The night saw a lot of people who had only ever spoken to each other on Twitter meeting for the first time in real life Photograph: Jon Cartwright/Jon Cartwright

Twestival wigs came in all sizes, shapes and colours Photograph: Jon Cartwright/Jon Cartwright

Many of those attending Twestival couldn't resist tweeting all about it to those who didn't manage to get there Photograph: Jon Cartwright/Jon Cartwright

Renate Nyborg, who organised the music for Twestival, arrives at the event Photograph: Jon Cartwright/Jon Cartwright

Hermione Way, from Techfluff.tv, shoots some Flip camera footage of Pete Cashmore of Mashable Photograph: Jon Cartwright/Jon Cartwright