The last one worked really well because it was everyones party. It was not just a party for a bunch of people getting on the tube, it was a party for everyone already on the tube. The general public are our friends, we gave them sweets, we gave them drinks and made them feel very very very very welcome. Commuters were staying on for extra laps, and we did not hear one word of complaint.
We tided up after ourselves and even the London Underground staff were happy.