Dinner and a film is fine. Dinner and a twenty-year-old unsolved murder is better. A cold case file gives two people something to work on together, and a reason to argue that ends with a high five.
A good date night has a shared goal and room for conversation. Films give you the first but not the second; board games often give you the second but put you on opposite sides. A case file puts you on the same side. You are partners reading the same evidence, and every few minutes one of you finds something the other missed. It is collaborative in a way most games are not, and the conversation it creates is about what you each noticed, which says more about a person than most first-date questions.
Start with the free case, Last Call at the Bluebird, a tavern owner found dead in his own walk-in cooler. It takes two careful readers about three hours, so plan an early start or spread it across two evenings; your progress saves in the browser. If you enjoy it, The Overnight Sleeper is a good second date: a locked room, a flask he filled himself, and a widow who never believed the suicide ruling. For couples who like a hard puzzle, Jane Doe, Room 14 asks you to identify the victim before you can find the killer.
The best way to play as a pair is to divide the folders, read separately for half an hour, then brief each other. One of you takes the police reports and forensics, the other takes witness statements and records. When you brief, you are not allowed to say who you think did it, only what the documents say. Then swap folders and read each other's half. You will each catch things the other skimmed, and that moment of "how did you miss that?" is half the fun.
If you are on the sofa, open a room with Play with friends so you each have the file on your own phone and can see which documents the other has read. If you are at the kitchen table, print the PDF of a case and spread it out. Paper is slower but more romantic, if a police file can be romantic: you will end up passing pages back and forth and pointing at the same line.
You will. One of you will be certain about the business partner and the other about the neighbor. Make a rule before you start: whoever wants to accuse someone has to point to two documents that support it. That is the same two-source rule every case on this site is written around, and it turns "I just think it's him" into a proper argument. If you still disagree at the end, each submit your own answer in the room vote and let the reveal settle it. Loser does the dishes.
Pick something you can eat with one hand while holding a statement in the other. A board of cheese and bread, a pizza, tacos. Avoid anything with sauce near printed evidence. If you want a theme, match the case: a diner breakfast for a 1990s truck stop, a cocktail for a 1970s ball.
Couples who enjoy one case often turn it into a monthly habit: one new file on the first Friday of the month. A yearly pass covers every case online for $69.99, about the price of one dinner out. Keep a notebook of the cases you have solved together, with the date and who was right. A year from now it is a strangely charming record of your relationship.
Pairs are rarely evenly matched. If one partner devours detective novels and the other has never solved anything harder than a crossword, give the newcomer the witness statements and the press folder. They read most like stories, and statements are where suspects lie, so the newcomer often ends up finding the key contradiction. The experienced partner takes forensics and records and acts as the fact-checker. It flips the usual dynamic where one person explains everything and the other nods.