Procol Harum

Beyond
the Pale

These were the What3Words coordinates:

infinite.melodic.composer.vast.wiring.diagram

The locations concerned were: Sturgeon BayWisconsin; Thatcher Dog Park, Oregon; Berlin; and Guangdong China.

Four ancillary clues, of which (only) one is nonsensical
1	This was a show at which, Gary Brooker claimed, fans might purchase ‘Procol suspender belts’	True ... he was alluding to the Procol tote-bags, with their four long black straggly handles
2	Eight of the songs at this show came from an album recorded by the evening’s five performers	Yes ... from Novum
3	Here’s part of a photo taken on the evening of this concert:	Hi Uta! She's pictured, albeit upside down, outside the venue, which gives you the local language (German) and the date (Saturday the 9th)
4	At one point during this show a wind-up octopus fell out of the kick-drum	Very regrettably this isn't true (or, if it is, the event has not been recorded visually, nor in words, to date)

So all competitors presumably wrote down the place and date (9 September 2017) in their daily notes.