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...
Brilliant Corners...Great sound system, vinyl only, dancing, left field, fourth world, jazz, afro, and some refreshing cocktails to help with all the sweating. Probably the only place i will actually dance in.
They also do amazing Japanese food earlier in the evening.
The oldest public art gallery in London also is my local gallery in my neighbourhood. Opposite to the Dulwich Park where I walked with my puppy regularly. They have great collections of Dutch paintings as well. My husband found the original Dutch painting of the print at his home he was growing up with.
Always interesting exhibitions and a nice little shop selling magazines, prints and books.. Small and simple gallery, surrounded by Hyde Park's beautiful elegant landscape.