It's hard to scale location-based entertainment. Disney tried the Galactic Starcruiser themed hotel, but it was a dud. Too expensive - $5000 or so for 2.5 days. It was a LARP dumbed down to Disney park customer level. Lots of mini-games, not much coordinated activity.
That's about how this sort of thing usually goes. Keeping everybody on script in coordinated activity is tough. I was involved with steampunk conventions, pre-COVID. Those took elaborate prep, but there was no all-player coordinated event.
The US has some events like this. Wasteland Weekend. The Society for Creative Anachronism. Military reenactment groups.
In my experience, the best immersive theater experiences find very clever ways to make the atmosphere work. In Sleep No More and other Punchdrunk shows, all of the guests are given masquerade masks to wear, the venue is fogged, and the lighting is dim. The dim and foggy atmosphere hides stuff that would otherwise take you out of the dreamlike 1920s noir setting of the show - that the other guest walking next to you is wearing a graphic tee, for example. The masks cast the audience as a shuffling horde of vengeful spirits haunting the characters for the sins they commit throughout the show - so when you see a big crowd following a character, it doesn't instantly feel at odds with the setting the way I imagine seeing a 5 year old in a Pokemon t shirt on the Starcruiser would.
There were also tons of people that would LARP for the story/role playing focus, with wooden swords and tennis balls for fireballs, at very, very low cost. The former derisively called them "curtain people" (занавесочники) based on their cheap-ass costumes. Isn't the whole point of LA-RP is that you RP so production values shouldn't matter?
Other spots Jenny's experience broke just seem like the game falling apart. Like getting invited to an event at a set time, getting there a little early and finding it's already over. Maybe they ironed that out later but that's a rough thing to have happen.
https://grimmoire.productions/
https://www.journeysandtales.net/
https://www.jackalope-larp.com/
https://www.sinkingshipcreations.com/
https://larpcoop.regfox.com/shirefolk
Or at lower production values:
I had heard of similar things in the UK, fantasy stuff. and also Evermore park in the US which was like an even more ambitious theme-park sized one that had a continuous ongoing story.
I'm in the US and they don't do this kind of thing often, but if you're interested by Odyssesus then nordic larp scene will totally be your jam, and honestly I'm jealous.
If there's anyone in Seattle doing this kind of thing, say something!
While not nearly as extensive as what's in the article, it's a first step achievable with a small group of friends.
Artemis Tom is cool and deserves the revenue and has a lot of cool scenarios and stuff out of the box. EmptyEpsilon is when you start to need more customization, down to source level, and GM tools. (The article mentions a lot of what this Larp did was not heavily automated and somewhat directly in EmptyEpsilon's GM tools.)
Another great Jenny Nicholson review: https://www.youtube.com/watch?v=L9OhTB5eBqQ
They advertise 20 pieces of custom software, is source available for these anywhere?