The alt.pub.dragons-inn reality is home to a shared fantasy world called Nexus. Most of the action centers around the titular inn, located in the city of Generica, which attracts all kinds of highly unusual customers from across the world.
Team M.E.C.H.A. from 000SUPERGUY stopped there on the way to the Looniverse during the Grand Tour; they encountered a familiar face in the unicorn hybrid Andrea, who had a counterpart in their own world. A local sorceror used one of the many portals scattered around this world to send them to alt.pub.havens-rest.
For more information, see Team M.E.C.H.A. author Chris Meadows's retrospective on the alt.pub.* groups. The Eyrie Archive hosts an extensive collection of APDI posts, located here.
- It would eventually be revealed that this was the same Andrea, from centuries in the past, who would later reach 000SUPERGUY via the same portal Team M.E.C.H.A. used.