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KREATOR (http://kreator-terrorzone.de/ )
Kreator was formed in 1978, this classic German thrash metal band "are experts when it comes to pure, unadulterated thrash metal". They've thus far released 12 studio albums, toured the world multiple times, and have a following unrivaled by many. Their 13th album, "Phantom Antichrist" will be released in June, 2012.
ACCEPT (http://www.acceptworldwide.com/ )
Accept are a classic German heavy metal band formed in the mid 70's. They've enjoyed wide, commercial success with albums "Balls to the Wall" and "Metal Heart". Their latest effort, "Stalingrad" was released on April 6th, 2012.
SWALLOW THE SUN (http://www.swallowthesun.net/site )
Swallow the Sun are Finnish melodic doom metal that was formed in 2000. They've released 5 albums to date, and have opened for such bands as Katatonia, Scar Symmetry and Insomnium.
For physical events that happen at a specific time. For example a concert, or dance performance. If there are multiple shows, you can still duplicate your event to cover them all.