The road restaurant with a dinosaur outside actually exists with the same name "El jabali de Oro" (the golden wild boar). It was a restaurant and a gas station located on the top of a hill between Mataro and Granollers (Barcelona) very frequented. The opening of a new road made it close some years ago.
For the rave party scene, all extras were selected on the criteria that they had attended a rave at least once, and a three-day rave was set up.