Looking for a specific place in factions.

Hello all you 100% carto people! I am looking for a location and need your help! I recall this place was in factions somewhere, possibly a cave. Mushrooms and dancing Am Fah were involved. Anyone have any ideas of where this is, or is this possibly some fever dream I had? Any help would be nice thanks

Quote from T D

This?

https://wiki.guildwars.com/wiki/Am_Fah%27s_guild_hall

YES!!! Thank you Exactly this, mushrooms and dancing peasants!!