Hello! :)
I've read about this idea some time ago and wanted to present it to you guys, specifically to people that can or want to lead guilds. It's something different, a semi-roleplaying idea, because it doesn't have to include roleplaying. And hint hint to mods, I am posting this in the Sargeras section because I play here and I am addressing the people here. :)
I remember in vanilla I was part of a guild called "Dragonmaw Clan" that would only invite orcs, being racist towards the other races and not making exceptions for anyone.
The idea is more applicable today, because there are more class/race combos, so I thought it'd be fun to have a clan that would not tolerate blood elves and undead, or perhaps a secluded night elf only order, an ironforge brigade made of dwarves and gnomes, or a Sin'Dorei royal guard made of blood elves only, you know where I'm going with this. :)
I for one think it would be awesome to see a guild of stampeding tauren only :D
Sadly, I am now casual and don't have the time to lead such a guild but if anyone wants to go for it, please let us know! I think it has a lot of potential and it will be catchy, people will want to join, especially if it's a focused guild: pvp or pve only.
Only problem for me is limited healer classes. Orcs for example cannot be paladins, priests or druids .
Usually such guilds don't last long, or they will start making exceptions for healers of other races which will make it just another guild anyway.