AThe focus was on the four of them to arrive in the "beast machine" dressed in the attire of the band, Kiss. By dressing as those band members, it gives the clear image that the movie characters themselves are united by a common purpose. To have Wheeler come in as his minotaur would have left the others to come up with their own equally impressive costumes.
AThe "LAIRE" name, as it is used, was made up for the movie. However, "LAIRE" is also the name of a real life LARP (Live-Action Role-Playing) game which does not focus on a Battle Royal as the movie does, but rather focuses on character development and adventuring (fantasy, magic, adventuring, and fighting).
Although the movie was inspired by battle games such as Darkon, there are many different kinds of LARPs out there: Murder Mystery Dinners, medieval, fantasy and sci-fi themes, historical and modern themes, military, Nerf, airsoft, paintball adventure games and so forth.
LARP is played by many different kinds of people all over the world. Participants are called LARPers. For More information about LARP, go to LARP Alliance or join their online community at LARP Space.