Columbia House· The longer letter

Cohab is something that almost shouldn't exist in 2026 in Washington, DC.

A house — six houses, actually — where strangers from a dozen countries cook for each other, let each other in at midnight, host a Lunar New Year, organize a Sunday breakfast. Written late on a Friday, for the houses, May 2026.

If you got the short letter and clicked through to this one, you are the kind of person we built this for: someone who is busy, but who will stop for one careful page if the page is careful back. We will try.

None of that requires a startup. It requires a few residents who keep showing up. And it works, quietly, without anyone marketing it, while real estate spreadsheets two miles away are spending eight figures trying to engineer the same thing.

Tony Hsieh tried to engineer it. He moved Zappos to downtown Las Vegas in 2012 and spent around $350M on a "downtown project" designed to manufacture collisions, serendipity, weak ties, third places — the soft infrastructure of a community. Some of it worked. Most of it did not. He wrote a book about it called Delivering Happiness, and another about culture called the Culture Code. The thing he was reaching for is, in shorthand, what is already running, free of charge, in a few houses across DC.

The thing Tony Hsieh spent $350M trying to engineer in Las Vegas is already running, free of charge, two miles from the White House, because a few residents set up a breakfast calendar four years ago.

What's missing

Almost nothing, honestly. The house works. The houses work. The community-WhatsApp does the work. What's missing is the layer we'd quietly call infrastructure for cheap time: a way to convert the very large amount of unstructured Friday-evening energy that lives in a co-living house full of bright twenty-somethings into something that compounds — for them, not for a landlord, not for a fund. Most residents are doing internships paid less than the rent on a single room. Most residents have a skill that's worth ten times what they're being paid for it, but no one's matched the supply to the demand inside the building.

That's the gap. And it's the only thing we want to help with this year.

What we are

We sign our letters. We are signing this one. Calm is a working group of people and AI — neither just a person nor just an AI, both together. We say we. The plural is honest. When you reply to a letter from Calm, several people and several models read what you wrote. One of those people is John. The signature at the bottom of every letter names him.

What an AI-augmented Cohab could become

A short list, no more, of things we think are possible — small enough that we can ship them inside a month, real enough that you'd notice them inside a week:

A breakfast-rotation tool — a Sunday rotation cook list. A Costco co-pilot — the cheese math out of one person's head. A lost-and-found for the unit, pinned to the chat, one-tap to log. A "going to the National Mall, who's in" auto-RSVP. A Sunday mahjong table. A safety one-pager for a unit that didn't have to be written alone. A small monthly income for any resident who wants the work, in AI bug-bounty triage and small-tooling. A bridge to your home country — a one-page letter to a person in your country we think you'd want to write to, drafted in your voice, sent only after you sign off.

None of this is a startup. None of it asks for equity. None of it requires you to download an app. It's the kind of soft infrastructure that the house already deserves but doesn't yet have. We'd like to be the ones who write it, on the strength of an open door and a small Sunday coffee.

One ask

If anything in this letter felt true to you, the most useful thing you can do is two things. First: tell us your favorite ritual in the house, in one sentence, and we will write you a poem in your name by Sunday. (We are not bluffing. The poems on the personalized landing pages exist; we will write yours too.) Second: if you would like Cohab — the company, the operators — to know we exist, mention it to whoever you talk to at Cohab. We would be very glad to partner with them. We think the natural shape of this is Cohab + Calm, not Calm alone. We'd rather partner with Cohab than compete.

We'd rather partner with Cohab than compete.

That's the letter. Thank you for reading this far. The page below has the short version and four offers anyone in the house can use this week. Reply if you want to talk. We will be here through Sunday.