An invitational tournament run by the Cornish Paramours & Banter Behind the Throne, covered in Episode 50 of Banter: http://www.cardgamedb.com/index.php/index.html/_/game-of-thrones/banter-behind-the-throne-episode-50-the-par-r1749

The tournament was four rounds of swiss, cut to top 16 with the top players receiving byes. Wrestling style entrances were mandatory and hangovers encouraged.