I was at the performance GregK mentions. I thought the "exit" was amazingly small considering the usual University "subscription audience". I was down front, so my understanding might have been off, but I did not hear noises behind me and only a few good seats opened up. Us AARPsters stayed - he's our guy after all. It was the "well dressed '30s crowd" that gave up primo seats.
From the layout of the mikes (and the drum baffles), I suggest all the concerts are being recorded. Hope this AARPster lives long enough to buy it.