"Onsen, a Japanese-style bathhouse in the Tenderloin, started spa services back up in 2024 after being closed for four years. It’s now the restaurant’s turn for a comeback. Though its previous menu of Japanese dishes are no more (at least for now), the restaurant hosts a rotating lineup of pop-ups for tasting menus every weekend. And yes, you can have a soak before dinner. We haven’t been here yet, but want you to know this spot exists. RESERVE A TABLE WITH RESERVE A TABLE" - Patrick Wong