The actress who played Nadine's grandmother (Monica Bleibtreu) in real life was the mother of the actor (Moritz Bleibtreu) who played the role of the brother of the main character in this movie. Monica Bleibtreu died in May 2009 and is remembered in the closing credits.
Moritz Bleibtreu was cast in Quentin Tarantino Inglourious Basterds (2009) as a part of the bar scene. He canceled because of time schedule problems with the production of 'Fatih Akin's' Soul Kitchen (2009) he already had signed for.
Main character Zinos (Adam Bousdoukous) used to own a Greek Restaurant in Hamburg Altona.
Soul Kitchen is a The Doors' song. The protagonist looks like Jim Morrison, the band's vocalist.
There is a restaurant named "Soul Kitchen" in Al Khobar, Saudi Arabia.