Seattle Decimation Fest a 2 day event full of non stop brutality for fans of extreme metal! 20 bands all day Friday and Saturday. Seattle Decimation Fest a 2 day event full of non stop brutality for fans of extreme metal! 20 bands. Friday and Saturday. Hot dogs on the patio by Glizzy Guys. Multiple bars, lots to drink. 21+ Only! End the summer with a bang at this epic party!