During filming the scene with the gangs meeting up for the first time. There was a man that didn't pay for his meal from a restaurant and was being chased by the waiter running across set. The whole stench gang cornered the thief and handed him over, to be handled by the police.
Director Rob Barriales broke his hand at some point before filming the last scene. He had to continue shooting with a cast on.
The opening sequence of the film was shot in the historic Hotel Chelsea. In fact, it used to be Dee Dee Ramones apartment. Stenches may have been the last film to ever be shot there.
The Earring that Daemon Zacherial wears is the replica of the character "David" played by Kiefer Sutherland in Lost Boys.
When both gangs meet for the first time. They have a 2 minute stare off. Which Rob Barriales was inspired by Sergio Leone's duels in his western films.