Cutty Sark, Thamesmead
The "semi-claustrophic beer garden" was an apt phrase though, particularly as Thamesmead boasts such a surfeit of fencing.
The Cutty Sark is built for darts though, as you would expect given that it's Andy Forham's pub.
It's a canal-side pub in a strange but not entirely grim lost part of London and they're trying their best to make a decent go of it. My visit, which admittedly was on a Monday afternoon, was very pleasant one.
14 Joyce Dawson Way, Thamesmead, London, SE28 8RA
This is Thamesmead, miles from anywhere. Your best bet is to get a bus (the numbers change frequently), most likely from Abbey Wood, Plumstead or Woolwich Arsenal overground stations, heading for the humorously named "Thamesmead Town Centre". Descend there, and the pub is in the pedestrian precinct, near the clock tower.