There are at least 5 bands named Cluster (a German ambient musical group, a French "heavy rock" band, a Brazilian band, an Italian vocal group, and a bolivian "punk rock" band)
These are photos from concerts where Cluster played, so they may be of other bands that played the concert as well.
The band played above a swimming pool, complete with swimmers
Cluster Mar 3, 2010 Sunderland, England, United Kingdom Uploaded by Phil Hume Hopper
Cluster / Brian Bergland and The Brain Aug 4, 1996 New York, New York, United States Uploaded by Joe M
