John is a mononym used by a numerous number of artists, some of them actually named John, some not.
These are photos from concerts where JOHN played, so they may be of other bands that played the concert as well.
IDLES / John Dec 3, 2018 Paris, Île-de-France, France Uploaded by Chalky1172
IDLES / JOHN Nov 3, 2018 Düsseldorf, North Rhine-Westphalia, Germany Uploaded by Andy Wilkinson
IDLES / JOHN Oct 19, 2018 Manchester, England, United Kingdom Uploaded by Oscarwilkinson
IDLES / JOHN Aug 30, 2018 Kingston upon Thames, England, United Kingdom Uploaded by Chalky1172
JOHN / Strange Cages Jun 21, 2018 London, England, United Kingdom Uploaded by Andy Wilkinson