Not sure if the style is native to South China (it might be Korean) but there are certainly a lot of them there, particularly Guangdong. These are huge, multi-floor complexes with baths, saunas, game rooms, movies, etc. Rows and rows of lazyboy style seats with food and TV displays where you can hangout and work on your laptop etc. Looks like this:

Not looking for a soapy or similar establishment, these sort of saunas are usually a family affair- has anyone encountered anything like this in Bangkok? They are an enjoyable way to spend a day.

Thailand doesn't have as far as I know.

Same Same but different

Only beauty Spas some with saunas,pools.

Search for yourself

Here

Japan have the best. Tokyo & Osaka largest Clubs.

Korean(with clothes)Japan(no clothes/small towel).

Spaworld Osaka was amazing

SpaWorld

Thailand doesn't have as far as I know.

Same Same but different

Only beauty Spas some with saunas,pools.

Search for yourself

Here

Japan have the best. Tokyo & Osaka largest Clubs.

Korean(with clothes)Japan(no clothes/small towel).

Spaworld Osaka was amazing

SpaWorld

I would love to find one in Thailand. I used to go regularly in both Japan and Korea (often after a round of golf.)

Although all the Korean ones to which I have gone are also nude like the Japanese ones.