Mary Marchei has seen 12 bands.

Band Concerts Seen
  Bad Company 1 concert
  Bob Seger & The Silver Bullet Band 1 concert
  Carrillo 1 concert
  David Bowie 1 concert
  Queen 1 concert
  Squeeze 1 concert
  Styx 1 concert
  Tedeschi Trucks Band 1 concert
  The B-52's 1 concert
  The Clash 1 concert
  U2 1 concert
  Van Halen 1 concert