Bang the lamps
For some reason, everybody in De Koffer (see my tip on restaurants) starts hitting the lamps that are hanging over the bar once they are sufficiently inebriated. I know that every pub in Holland has a bell and when you ring it you have to pay a round for everybody, but I don't think this has anything to do with it. It is a funny sight though; all along the bar are drunk people sitting in the shifting shadows of the swinging lamps.
