Yesterday, I went to a Robbie Williams concert. Usually, I do not take seating tickets for such a gig, but since it is a swing concert, my wife and I decided to take these tickets this time. Unfortunately, we had come to the conclusion, that some people holding seating tickets show very bad behaviour. First, a group of about 7 people came approx. 20 minutes to late (unfortunatley, they were right next to me, so I had to stand up and let them pass). Then, they needed another 5 minutes to get rid of their jackets (well, actually you should have…