When Paul Soter and Erik Stolhanske are initially being led to the Beerfest arena, the other members of Broken Lizard have cameos. Kevin Heffernan is a German woman putting a human leg through a meat grinder, Jay Chandrasekhar is a blind bearded man being circled by a singing boy on a tricycle, and Steve Lemme appears as a clown-like character sporting a strap-on.
The large, beer-filled, boot-shaped glass termed "Das Boot" in the movie served as the grand finale' of all of the drinking games. Actually "Das Boot" translates as "the boat" in English. "Der Stiefel" would be the correct German terminology for "the boot." Such "beer boots" are known as "Bierstiefel" in Germany. They are descended from the centuries old German soldier's tradition of accepting the challenge to drink beer out of another's boot.
The final scene with the message "Coming Soon - Potfest" was confirmed by Broken Lizard as a joke to make this film have an open-ended feel. The troupe said there has been fan support to create the sequel, which might be made as an animated film.
The shape of the final beer mug is in the shape of a big boot. Everybody refers to it as "Das Boot", that means "the boat" in German. However, it also refers to the actor Jürgen Prochnow, famous for acting in the legendary German movie Das Boot (1981).
The Swedish drinking song that is heard at Oktoberfest right after the Australian sailors has sung theirs is called "Helan går". It is a song traditionally sung before indulging a small glass of akvavit.
Beerfest was inspired by Broken Lizard's experiences at Colgate University, as well as a spontaneous "boat race" drinking contest at a beer festival between the comedy troupe members and Australians during the promotion of Super Troopers (2001). The names of some of the characters in Beerfest are taken from classmates and fraternity brothers at Colgate University, including the nickname "Landfill" and a brief mention of "Tommy Malarky". After the German cast members completed their final day of filming, the American and German cast competed in another boat race; the Broken Lizard team won two out of three games.
Steve Lemme's character, Charlie 'Fink' Finklestein, is named after the character Barton Fink (1991), from the Coen Brothers movie of the same name. Steve wears the same glasses and has the same curly hairstyle as Barton Fink.
The Australian sailors at Oktoberfest have the ship name "HMAS Wala" on their caps. HMAS Waller is a Royal Australian Navy Collins-class submarine, another of the many submarine-related references in the film.
The t-shirts worn by the contestants in the hot dog eating contest display a yellow, red and turquoise logo, which is identical to New Mexico state license plates. The plates consist of a yellow background, red numbers and letters, and turquoise graphics on the bottom. A large portion of Beerfest was filmed in Albuquerque, New Mexico.