Duke's Brew and Cue right by Haggerston Station. Seriously, the best ribs I had in London. You need to book a table first. Also nearby is (or used to be) a bar called Draughts where you can play board games, it's pretty fun.YEEEEEAH! @Rea - you should try the beef ribs at

Another time you could go to Pitt Cue, also very good. You need to turn up and...queue. Near Oxford Circus. There's a blues bar nearby with live music too, I forget where or what it's called but it's tiny and it's always good! I'm sure if you asked around you could find it easy enough.

I have so many suggestions, but those two for sure you gotta try.