In January of 2004, America Online (AOL) released all works and content relating to the Red Dragon Inn, Stars End Bar, and The Duels into the Public Domain.
That means anyone who wants to use the above settings can! Just make sure that what is being used wasn’t created by another player. All content created by an individual belongs to that individual. The settings and locals may be public domain but characters, stories and anything created by the players has copyrights.