This is probably a waste of time since anyone reading here has probably already demonstrated significantly more thinking power than some of the people I see in game.
If you want to hunt an instanced zone - like Antonica or Oakmyst or wherever - and want a group then try all the instances. If you are out of luck in Antonica you can click back on the bell and pick Antonica 2 and see if anyone in there wants you.
When people are spamming LFG calls every few seconds I have to wonder if this very simple thought has occurred to them.
Secondly have a look at the people there. ("/who" is your friend)
I was running the Tour of Antonica last night and for over an hour there was a level 7 /oocing his LFG.
Now there are probably things he could kill there and I'm not contesting his right to go and get killed wherever he chooses but a simple /who would have shown that there were no other people his level that he could group with. In the time he spent LFG he could have gone solo or grouped easily in any of the lower zones and made 8 or 9.