From my PoV that'd be the 1970s|1980s ... when I heard AC/DC in the local Fremantle Tavern, along with the Divinyls, David Helfgott (classical piano) down at Riccardo's wine bar, touring orchestra's at the local concert hall etc.
Tickets were cheaper than record prices and entry was easier if you were on the roadie circuit and either did some stage work or got waved in by friends through the stage door.
