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.

Choosing Keeping has a collection of rare, beautiful European, American and Japanese stationery. A stationery haven. 

Event space and studios with eclectic group of musicians, artsist, DJs primarily around jazz, world, folk, experimental music 

Whipps Cross flats next to Hollow Pond boating lake is where I run. A perfect antidote to the chaos in the city.

A very good selection of non-fiction, essays, and rare books. The Japanese book collection is gorgeous!