London is probably my favorite city to walk around. Plenty of bars, and little nooks. There are plenty of great neighborhood but Shoreditch is probably one of the coolest. I would describe it as a Lower East side if you're familiar with NY. It used to be shady but in the last 2 years it's been redeveloped and it's great. Great bars, little boutiques, street art, restaurants and hipster cafes (if you're into that^^)