Actually Jam has seen 249 bands.

Band Concerts Seen
  Bastille 4 concerts
  Bloc Party 4 concerts
  Primus 4 concerts
  Silversun Pickups 4 concerts
  Third Eye Blind 4 concerts
  A Perfect Circle 3 concerts
  HAIM 3 concerts
  Modest Mouse 3 concerts
  Tool 3 concerts
  Billie Eilish 2 concerts
  Blood Orange 2 concerts
  Brasstracks 2 concerts
  Cannons 2 concerts
  Carly Rae Jepsen 2 concerts
  CHVRCHES 2 concerts
  Death Cab for Cutie 2 concerts
  Florence + the Machine 2 concerts
  Hozier 2 concerts
  Jack White 2 concerts
  Jungle 2 concerts
  Lizzo 2 concerts
  Lorde 2 concerts
  Middle Kids 2 concerts
  Ocean Park Standoff 2 concerts
  Oliver Tree 2 concerts