One of our favorite spots for a drink is Balans Soho Society. We went to the Kensington location twice our last trip and loved everything about this place, from the service and vibe to the food to, of course, the cocktails.
I had the very classily named Porn Star, a saucy little cocktail featuring vodka, vanilla, passion fruit, and (love this) a Champagne shot. Behind the Porn Star you'll get a peek at the Jaliscan Night, a pitch-black concoction of tequila, activated charcoal, agave, and violet.
Next time we're trying the absinthe fountain ritual!