Not the most exciting place inside, but a lovely rooftop area which not all that many people seem to know about, 2 mins walk from Old St station. If it's packed then The Red Lion is just up the road.
Arguably the best café in London – or at least East London – with an incredibly welcoming atmosphere, delicious array of food and drinks, and hypnotising views to Broadway Market. Visit early in the mornings, for a roque-monsieur at lunch, or to get lost in their cheese selection at the market stalls on Saturday. Warning: addiction likely to occur.