Jim & Tonic (Mercato Metropolitano)

You're wandering through Mercato Metropolitano's labyrinthine food hall in Elephant & Castle when you spot it—a proper cocktail bar wedged amongst the pizza joints and pasta stalls. Jim & Tonic does exactly what it says on the tin: they take gin seriously, and the cocktails reflect that focus. It's the sort of place where you can grab a well-made drink without the usual cocktail bar pretension, surrounded by people tucking into arancini and fresh pasta. The vibe is distinctly casual—you're propping yourself up at the counter with a drink in hand, the energy of the food hall buzzing around you.