All of the alcohol in the film is either water or root beer.
Needing a way to connect certain scenes, the idea for the film within the film was developed. In certain scenes the characters are watching a awful film noir movie which has some of the most terrible lines ever written.
For the duration of shooting, the filmmakers actually lived in George and Jess's apartment.
In the opening scene when Dana is leaving her job, the exterior is actually that of R.T.'s bar and Grill- the inside of which served as Bill's.
Bill's was originally written as a very lively bar, but due to the lack of extras was rewritten as a dive that is no longer a place to be.