There are at least 4 bands called Melatonin. One from Lausanne, Switzerland (rock alternatif français), one from Sursee, Switzerland (Space/Experimental-Rock), one from Turkey and One from Russia , Samara (Trip-hop, Downtempo, Lounge, IDM).
These are photos from concerts where Melatonin played, so they may be of other bands that played the concert as well.
Gone South Nov 30, 2002 Launceston, Tasmania, Australia Uploaded by Wattoson