Watching it now. Christ, Band du Lac is music for old people. Why would they do such a slow version of "handjive"? The audience looks like dawn of the dead.
It was a charity event and if I remember correctly tickets were about £100 each.
Dress code was dress suit and tie, so yeah, the audience will be full of well-to-do people who know how they are expected to behave at such an event.