How not to join as a spectator?
First set your filter. You want two filters, one that is 8v8 and the other is 5v5.
In the 8v8 one, you want a room that is less than 16 players. In the 5v5 room, you want a room that is less than 10 players.
That is it.
5x Warrior, 5x Ranger, 4x Elementalist, 4x Engineer,
4x Necromancer, 3x Mesmer, 4x Guardian, 4x Thief, 4 Revenant
4x Necromancer, 3x Mesmer, 4x Guardian, 4x Thief, 4 Revenant
Room No.001-099 = 8v8 If it show 16/20 you may enter as a spectator.
Room No.100+ = 5v5 If it show 10/20 you may enter as a spectator.