When in Tokyo & Yokohama recently, the GF and I really enjoyed visiting several upscale onsen that had private bathing suites for couples....
They were large, luxurious and well-equipped with a huge furo, separate cleansing area, a full line of products, and great views. As well as communal baths, locker rooms, food & beverage and other supporting facilities.
I've read through Google links, websites and Yelp reviews about half-a-dozen Japanese/Asian type spas/onsen in town, but none seem to offer this option (or make it clear what may be available).
Anything like that available in San Francisco?
And, if you would care to throw out the name of your favorite hotel for a visiting couple near City Center in the $200 to $300 per night range, that would be great. Haven't stayed in a hotel on a pleasure trip in The City for years; its always friends or VRBO when not on business.
Thanks for your insights.