A restaurant, bar and club all in one- saves you a cab fare at least. Come to the restaurant for generous portions of Latin American and Mediterranean tapas, which also come in handy if you get the munchies following a few after work cocktails.
If it's just a drink you're after, follow the advice of Bacardi- that voted it best bar in London- and head to Havana Cocktail bar. Happy hour runs throughout the week as well as the L10.45 pitchers that are on offer all day everyday.
Once you've consumed enough brew to handle some Latino pop, head on in to the Square's Club Havana. Boogie with sweaty Ricky Martin wannabes in an unashamed fashion til 2am.