www.knightrealms.com
This site is home for a community of several hundred LARPers in the New Jersey area of the USA. The community is close to 18 years old now, but has evolved from a static HTML, through Joomla 1.0, up to Joomla 3.x and the latest CB and GroupJive versions.
GroupJive specifically plays an integral role in the functionality of this community. While the Staff of the game rely on Joomla user groups to manage Out-Of-Game (real-world) security for the site, the In-Game aspect (character interactions) of the game are managed by the players themselves using GroupJive - no Joomla Admins needed to handle all the requests! The players can join, manage, and leave groups for themselves, while the secure aspects of the game's operation remain run by the Staff.