Yes. The Wowironman guild located on Wyrmrest Accord – US (Alliance) can be considered the original, oldest and pretty much official Iron Man guild.
In order to join, you can do a /who wowironman and ask a member for an invite. For Non-Iron characters, guild repairs and the guild bank have been
disabled to stay within the spirit of the rules. You are welcome to join, however, besides the fantastic guild members, you won’t get the
typical perks you’d normally get from a regular guild.

There are other guilds out there on EU and US-Oceanic servers… for a full list, please see the Guilds section.