There are at least six bands called Cocoon:
These are photos from concerts where Cocoon played, so they may be of other bands that played the concert as well.
Glastonbury Festival 2011 Jun 22 - 26, 2011 Shepton Mallet, England, United Kingdom Uploaded by A Badger Faced Man
Cocoon Apr 27, 2005 Paris, Île-de-France, France Uploaded by Thierry F
