From the LARPA Wiki Project:
The Live Action Roleplayers Association (LARPA) is a non-profit organization that exists exclusively to promote live roleplaying (LARP) around the world. LARPA does not run games, and does not promote any one system, group, or type of event. LARPA supports and promotes all live roleplaying, and LARPA members come from many different groups, backgrounds, and types of event.
LARPA promotes live roleplaying by providing schedule information to make it easier to find an event or group to participate in, and works to educate the general public.
LARPA also works to build the live roleplaying community, providing a place for everyone involved in running, organizing, promoting, or just participating in live roleplaying events to network, discuss and learn from each other. One of the principal activities of LARPA is licensure of the INTERCON name for LARP Conventions.