For the uninitiated, “capsule hotels” refer to very cheap hotels where “rooms” are actually individual “capsules” (aka “pods”) that fit only a single person. This concept came from Japan during the 1980s Japanese economic peak but it seems it is now gaining international popularity. See Capsule hotel - Wikipedia for a more in-depth introduction to capsule hotels.
Then, it surprises me that the OSM wiki does not document how these should be tagged. I infer from this, this is new to the wiki and so there were no previous discussion nor consensus.
There are two ways I can see this:
Following motel’s example, since these capsule hotels are their own class of tourist housing, they should receive a new major tag (e.g. tourism=capsule)
In practice, capsule hotels do fit the description of a hostel (guests do rent “beds” inside a very large corridor), so they should receive a new minor tag (e.g. guest_house=capsule, as hinted by the iD editor)
Is this a requirement? I think of places that can accomodate two people but that I personally would still call capsules. See CityHub in Rotterdam for example:
The complication is extending beyond capsules, larger compartments with a proper bed where you can stand in, not stacked vertically https://en.first-cabin.jp https://first-cabin.jp/wp-content/themes/firstcabin_cms_v1/assets/images/spend/spend_01_photo03.jpg
A =capsule_hotel feature would be unsuitable for it. =hostel is defined by shared communal facilities, and the sleeping pod or compartment could be considered as a variation with more privacy than beds in the same room.
Furthermore, such a business can provide both pods and such “cabin” small rooms global cabin｜ドーミーイン【公式サイト】
As a comparison, some hall-of-residence can provide private rooms for each student individually, as far as an “en-suite” with private toilet. They should still be handled together with bunk bed shared rooms somehow.
