Guild Wars 2

Instead of having an LFG feature for dungeons (or maybe in addition there’s no conflict) it might be a good idea to use GW2’s multiple guild feature, except that special guilds created by Arenanet would exist for doing particular content: such as Ascalon Catacombs Guild etc. You could represent these guild in addition to any other guilds you are a member of (and need not unrepresent to be a member).

When you want to do a particular dungeon, all you’d then need to do is to join up with the particular in game guild group and it would have its own chat channel for fixing up groups, arranging comms etc.

One advantage of this is that you don’t get stuck in a long two hour dungeon with a random PUG, but can set everything up, such as voice comms etc. beforehand. You could also get an idea of what people are like by following the chat.

This idea could also be extended to other areas where people share an interest, such as WvW and you could even have things like an “explorers” guild for people who like exploring.

Membership in these guild groups might elapse if you were not active in them for 24 hours (so you don’t have to resign when yr done with the content), but you could always rejoin by seeing an NPC in town.