Maciej Karol Orzechowski has seen 9 bands.

Band Concerts Seen
  King Crimson 7 concerts
  Slayer 3 concerts
  Anthrax 2 concerts
  Helhorse 1 concert
  Lamb Of God 1 concert
  Megadeth 1 concert
  Obituary 1 concert
  Peter Gabriel 1 concert
  Placebo 1 concert