The Almeida, in Islington, is a small theatre with big influence. It's an intimate place to discover groundbreaking theatre and get up close to some of Britain's leading actors. The cafe/bar across has a constantly-changing tasty menu, relaxed atmosphere and free wifi. Open all day and great place to spend time even if you're not going to catch a production.
P Franco, wine shop, bar and restaurant. Amazing wine, delicious small plates (guest chefs) in a very lively atmosphere. The wait for a spot to sit down is worth it.
This is over the road from my house and kind of feels like being transported back in time to the goth night I used to go to when I was 15. But much much bigger with much more entertaining outfits, cages, lasers and… BBQ.
The best thing about any charity shop is that you never know what you are going to find. I have a well tested route around London that includes all of my favourite charity shops. This Oxfam has a great selection of books and often turns up some interesting clothes too.