London - Wahacca
Wahaca was founded by Tomasina Miers who famously won Masterchef in 2005. She has since set up her hugely popular Mexican street food inspired restaurants.
With all the classics you would expect, tacos, quesadilla and burritos there is also an extensive cocktail and tequila menu. You can't book - just turn up and sip a cocktail or velvety hot-chocolate until you are seated in the dining room. The atmosphere is fun, lively and relaxed.