for me everywhere is OK as long as we keep it running!
Only dropping your rss or wait there for rss to summon doesn't work, i've tried it several times.
So - the ps3 chat is the hub for me. I log in say hi and ask where and on what SL we are fighting and if there are special rules for tonight (like cosplay some days ago). That works very good.
So not the designated spot is the way to get duels, but the ps3 chat is doing that!
I can't host everywhere (only have one SL100) atm, but we got enough smurfs online nearly every evening (GMT) to get a host everywhere.
Invader:
They are funny breaks in a fight, i like them. Always fun when they arrive and check whats going on. Some stand at the side waiting for the duel to end and then step into the ring. Some need to be hunt down (damned went there to kill host and got ganked by two reds...) and some are so suprised from the situation, that they are dead in seconds.....always fun.
BUT the screeming "Invader slot free" in the chat from the host is something we need to discuss. When i am also able to host in that area and i'm alive to set my rss, because we got enough hosts, then my rss has a good chance to dispear, or get invaded by the dueller, which i wanted to fight in the world of the host and not in my world.
I prefer to fight random invader every now and then. Better than rss disapear or get invaded by someone who also wants to fight in the world of the host.