Were there any tourneys in the North, Iron Islands, or Dorne? What other kinds of sporting events, concerts or other “pop culture” would you expect to see in those regions?

The North prefers melees to jousts.

Dorne definitely has tourneys, as several Dornish characters – Oberyn Martell, Arthur Dayne, Lady Lance – are skilled jousters.

The Iron Islands probably doesn’t have enough horses or open land for jousting to be a big deal, and prefers its own traditional sports like the finger-dance.