The second coffee shop has to be Kaffeine. Having only recently come across this one, I was certainly impressed and they may even have the best coffee I've had, since a short stay in Portland, Oregon.
The Roundhouse was built as a steam-engine repair shed in 1846, and then became a warehouse before falling into disuse for 25 years and reopening as a performing arts venue in 1964 hosting acts like Jimi Hendrix, The Doors and Pink Floyd. It was redeveloped between 2004-2006 and is one of my favourite music venues in London; it’s a beautiful building, has a great sound and isn’t too huge so feels fairly intimate. Some highlights for me this year were The Flaming Lips, David Byrne & St.Vincent and the Timepiece installation by Conrad Shawcross.
I've had a love affair with the BT Tower for some time now. Unfortunately entrance to the public was shut in 1980, but earlier this year I was invited up to the top, where the revolving restaurant once stood. The views were absolutely breath taking.