The Dijon Story told in the movie actually happened to a person during his exchange student year in Dijon.
The finger mitts used to drink the hot shots ordered in the bar were developed specifically for the movie.
All the extras in the film are genuine Neukölln hipsters from Berlin and represent a dozen different nationalities. Some of them, like the DJ, showed up in their own clothes.
Ernesto Lucas, who can be seen drawing in the background by a table, was actually drawing the movie poster while acting as an extra in the set.
The finger mitts used to drink the hot shots ordered in the bar were developed for the movie. And they work.