It is part of a comprehensive growth plan for the Cambridge-based company, which said it aims to have a presence in all the big southern cities and one northern location within the next five years.
Co-owners Richard Holmes and Benny Peverelli originally approached their existing investors, raising over £600,000 in just one day.
They are now looking for new investment from the hospitality industry, with the money raised due to be used to fund a second site in London, scheduled for opening this year, and a site in another UK city.
Holmes said: “Our growth plans for 2015 are ambitious which is why it is crucial that we have the right funding in place. We’re lucky to have already received investment from a number of renowned industry figures, including Steve Wilkins, founder of Little Gems Country Dining, and we value the advice and support they have provided us with.
“With this in mind, we’ve decided to approach the hospitality sector directly again for investment, rather than turn to VCs or crowd-funding. We think we offer an exciting opportunity for those looking to support a growing bar and restaurant business that offers something different. We enjoyed superb sales and critical acclaim last year and fully intend to build on this in 2015.”