What business does two guys who go to Las Vegas, Nevada in "Fear and Loathing in Las Vegas" have to handle?

The 1998 U.S. black comedy film "Fear and Loathing in Las Vegas" is about two guys who have both personal reasons and a business reason to travel to Las Vegas, Nevada. Raoul Duke (Johnny Depp) and Dr. Gonzo (Benicio Del Toro) are a journalist (sportswriter) and psychopathic lawyer respectively. In this movie, it chronicles the hallucinogenic misadventures of these guys on their three-day romp from Los Angeles to Las Vegas. They travel across the Mojave Desert in a red convertible to get to Sin City (Las Vegas, Nevada) to provide press coverage regarding a motorcycle race. This is their business reason for the trip.

The two individuals in this case are best described as hazy travelers who love to take a cornucopia of psychedelic drugs. They appear to work professionally only when they have no other choice.