Voted the best cup of coffee in London by TimeOut and reviewed by the likes of the New York Times, The Espresso Room is a little gem in the heart of Bloomsbury. A tiny room fitting the essentials (the coffee machine and a couple of benches), it offers delicious lattes and a range of roasts. Alongside the praised coffees, home-made sandwiches are freshly prepared with good quality bread and ingredients (chicken and artichokes is delicious) and, of course, you can accompany your cappuccino with a croissant or a chocolate brownie. A cup of coffee here feels like a treat. The Espresso Room, 31-35 Great Ormond Street, London, www.theespressoroom.com