The most special and charming place to get art supplies and materials.
L. Cornelissen & Son shop is an artwork in itself and one of a kind. The staff are incredibly knowledgeable and kind and is always a delight to stop by.
Slightly biased as this is where I live, but Stoke Newington is great place to spend lazy saturday / sunday afternoons getting sloshed with friends. There are 10 + pubs within walking distance who all are great places for one reason or another. I'll pick out the White Hart for its huge beer garden...