"well i'm all for free wifi being a laptop owner without internet @ home so was keen to look on the east London section of this article. But what no departure !! not only do they have free WIFI they are quite possibly the candidate for best cafe / multi use space in the galaxy and the friendliest staff in the universe !! Check them out you wont be dissapointed http://www.depart.in/
and what about all the idea stores in tower hamlets ??
free wifi in several locations and cafes too in places
oh and on the subject of wetherspoons the first time i went their server was being repaired and the second time it didn't work because even on their leaflet they don't give the right info to allow mac users to connect, and the windows info is printed so small you cant actually read it.
anyway gripes aside there's a lot more free wifi in east london than you have found, and not that i'm getting commission but if you dont know about departure i suggest you get your selves down there pronto