One can’t help but wondering if their work leverages one of the variety of card index filing systems? Were they commonplacers? Zettelkasten users? Were they maintaining them as basic databases? Monster rolodexes? There are definitely a lot of them around.
It’s obvious that Jeremy actively uses his as in the opening scenes, his card index is on the credenza behind him and later in the movie it has moved.
If you’re just starting out on your indexing journey, you can purchase the same boxes that Wilson and Vaughn are using: the Globe-Weis/Pendaflex Fiberboard Index card storage box in “Black Agate”. If you need something bigger or different than one of these, try out the Ultimate Guide to Zettelkasten Card Index Storage.
A Zettelkasten for Wedding Crashers
Of course, the real aficionado of Wedding Crashers will suspect that at least one of Jeremy’s card indexes is full of weddings they’ve crashed, related research, and maybe women he’s encountered. Maybe names and legends of the people they’re pretending to be (“We lost a lot of good men out there.” “Guess who’s a broken man?”) Naturally there would also be a huge section with the numbered rules of wedding crashing as handed down by pioneer Chazz Rheinhold.