Real Ale CAN be served at large events - in fact if you look along the coast to Brighton's new ground they have announced they will be selling Harveys Best and Dark Star Hophead (both local brewery's to them) in each of their concourse bars.
I think the trick is to sell 'bright' ale - this removes the need for settling time etc and is usually easier to pour. Effectively you have 'pre-conditioned' beer - it has done all of its settling and stuff before it is moved into its distribution vessel. The shelf life is drastically reduced though (usually a couple of days max), but I am sure a stack of polypins could be delivered on the morning of each match?
Failing that - a stack of bottled Ringwood Best\49er would do me nicely! (Anything but that godawful smoothflow rubbish that you usually get in stadiums!).
