Went to Meat Market in Covent Garden a couple of weeks ago and had one of their Dead Hippy burgers, which was very good, but it was their chilli fries that were superb.I've had stuff from Pitt Cue truck which was pretty gorgeous but I think turning up to their place will involve a long wait which could be annoying.
Dukes in Haggerston is nice and you can book - also it's a big beer place with few dozen options, towards the American craft beer side. Beavertown is their sister brewery, now based in Hackney Wick but previously downstairs from Duke's, their 8 ball rye IPA is lovely!
I've read very mixed reviews of Red Dog.
Pitt Cue is worth a visit - if there's a queue (there wasn't when I went on a Saturday night this time last year) the White Horse pub is just opposite.