For all of the party montage scenes the actors just bum rushed real house parties with cameras and raged along with everyone else.
The filmmakers hope to make eight more Wet and Reckless film's one day just so they can have more films than Harry Potter.
The movie originally had three male PPD member as well as Sonya. The third member of the PPD, "Long John" was fired weeks before shooting and the entire script had to be re-written.
The sequence Bitch Hunter wasn't in the original script. Jason Trost was at a house party they were filming at and ex-cast member, Long John's girlfriend couldn't be found. Jason when after her with the camera on the spot. What followed became "Bitch Hunter".
Contrary to popular belief, 95% of the movie is scripted. Very little improv is in the film.