There's already a large offering of such spaces in Korea. You have cafes where you can bring your laptop and work in peace, there's pc cafes / pc bangs which are more for gaming but provide a desktop, there are places where you can rent co-working spaces or spaces for co-working that you can use with a membership.

Co-working spaces of all types are ubiquitous in Tokyo FWIW. Near my midsize station I had about 10 different providers in a 10 minute walking radius, some with multiple locations even!

Most have a selection of plans to choose from: hourly, daily, monthly, etc

I chose a bit more upscale one without a fixed seat. I pay ¥1100 (7.5 USD) I think for each day I use it, with a monthly minimum spend of ¥2200. It comes with free mediocre coffee/tea. It is consistently clean and library quiet as people follow the posted rules including minding the volume of their typing and headphones.

I would be surprised if the situation in Seoul was significantly different.

They actually have exactly that for gaming: a "pc bang" like a internet cafe. I wonder if it has been tried in earnest for co-working. You would think it is an easier business so long as the demand is there.

What a novel concept!

https://en.wikipedia.org/wiki/PC_bang

I somehow doubt that people are lugging a desktop and printer around the city, only to set it up and work for 1 hour in Starbucks.

With starbucks delivery, starbucks printing, etc.

Isn’t that how most coworking spaces work already? I’ve worked from a lot of them, and it always worked like that: I check in when I arrive in the morning, and when I check out at the end of the day, I pay for the number of hours I have spent there (often capped to a maximum of 5 hours or so, even if I stay longer).