I've been to gigs recently where the average age upstairs at the live band was probably 50-60 and downstairs in the bar the 20-30s were out for the pub quiz.
I went to the US to see ACDC, Metallica and Tool at PowerTrip and the only people that could afford it were basically retirees :D I still love a pub quiz though.
They're the days I remember. Then it was emailed barcodes to scan. Now apps? I must be too old to be listening to live music.