
The event is sponsored by Smirnoff Original Nights, scheduled for August 6 at Vibe Bar in Shoreditch, featuring on-screen live Twitter feeds, and music-related giveaways throughout the night.
plans to stream the event worldwide through Twitter using a dedicated Ustream feed.
Three UK bands, including Essay Like Nephew, Mike Digna and The Seal Cub Clubbing Club, will compete in separate gigs with the winning act, voted for by Twitter users, will nab a cash prize of £250, courtesy of Smirnoff.
Event promoters are relying on Twitter itself to draw users to the gig and spread buzz around the microblogging website.
Rax Lakhani, spokesman of Twitgigs, said Twitter is the "perfect medium to bring together musicians and music lovers".