Seattle’s Green Lake Aqua Theater was a short-lived watery amphitheater. In May 1969 Three Dog Night headlined a show there. They were supported by up and coming British import Led Zeppelin.
So this week’s theme is unlikely and impressive support acts.
The Housemartins were their own opening act. The four band members would play doubles ping pong on stage before their main set.
I once saw Johnny Cash play the Glastonbury main stage on a Sunday afternoon. He was preceded by an address by the Bishop of Bath and Wells.