I've often thought that there ought to be a pretty good crawl to be had around the central parts of London using existing tube and overground railways. Someone with better knowledge of the worthwhile pubs should propose it for a PuG crawl - how about next March?
Just taking as examples some of the few pubs on
this list that I've actually been to:
The Southampton Arms is a brisk five minute stroll from Gospel Oak station;
Tapping the Admiral is even closer to Kentish Town West;
Euston Tap is obviously handily placed for a number of lines;
The Old Red Cow is not far from Barbican.
Looking at the map handily embedded in the list, there's the
Draft House Charlotte just round the corner from Goodge Street tube;
The Harp is easily reached from Leicester Square;
Farrs School of Dancing is pretty close to Dalston Junction.
Of course I'm not in any way saying that the above examples should be on a crawl, they are just examples of how London's existing transport links could easily be exploited for a potentially excellent crawl. It's just a matter of picking a round dozen of the best and working out a route. Volunteers?