Looking for a SF hotel that offers spa packages in early December 2018.

Several, mostly high end, hotels have spas, and all that have spas offer packages. What sort of budget?

​​I don't budget for spas on vacations, so you will need to check Yelp or TA for full reviews but here are a couple of ideas:

Marriott Marquis has a full spa. We stayed at this hotel before their remodel and really loved the views. It is near the convention center. If there were a major convention, I wouldn't stay there (unless, of course, you were attending the convention).

Also well-known are some of the spas in Japantown. Kabuki Springs is the one I've read about the most.

The Marriott chain presently has a workers' strike on--no idea when it might end.