Band Concerts Seen
  Old Man’s Child 1 concert
  OMG Robby 1 concert
  One Master 1 concert
  One of Nine 1 concert
  Opeth 1 concert
  Oppressor 1 concert
  Opression 1 concert
  Oracle 1 concert
  Orange Goblin 1 concert
  Orden Ogan 1 concert
  Organ Failure 1 concert
  Orphaned Land 1 concert
  Oruã 1 concert
  Ossuary 1 concert
  Other 1 concert
  Overdose 1 concert
  Oxygen Destroyer 1 concert
  Pablo Lavoe 1 concert
  Pagan Altar 1 concert
  Pain 1 concert
  Painful 1 concert
  Palafoxx 1 concert
  Pan-Amerikan Native Front 1 concert
  Papa Roach 1 concert
  Parabellum 1 concert