I'd planned something with a friend round some of the London clubs (Blue Square Premier and above):-
Crystal Palace
Millwall
Charlton Athletic
Dagenham & Redbridge
West Ham
Leyton Orient
Spurs
Arsenal
QPR
Brentford
Fulham
Chelsea
It was going to be about 120km or so, a nice weekend day ride. Further if you include Barnet and Watford and AFC Wimbledon, although including Watford means you can pass Wembley...
Would be easy to change the order to start with the Daggers and go anti-clockwise from there.
Never got as far as an actual route.