The Opera Tavern Offers Secret Menu Items to Twitter Followers
By: Marissa Brassfield
Published: January 20, 2012

The Opera Tavern in London has found an innovative way to engage its Twitter followers: it offers a monthly secret menu especially for them, which is available at the restaurant for one night -- if you know the password, that is. The Opera Tavern tweets out the ingredients in a special burger and then the password.
The burger below honors the Opera Tavern's first birthday. It boasts a bevy of duck, and the password was "What's the quack?"