@myt3m0w53
I'm assuming you are referring to this
list.
Most of the non-devotional, non-quest-specific groups are player run "guilds". Their membership is handled in-character. If your character wants to find out about the different guilds of Layonara, this needs to be done IC, either in-game or via the IC forums (typically the
Rumour Has It forum, or one of the Taverns forums (
1,
2,
3). Some of the guilds are trading guilds, and have notices in the
Trade and Market Hall forum.
Another way is to do a search the forums for the various guild names as a sort of background information check. Bear in mind, not all of the guilds have a high public profile.
Regards,
Script Wrecked.