A modest but cosy room in an incredibly convenient location. Geary St has more food options than I could count and is walking distance from Polk St, SFMOMA, the Embarcadero etc.
Tenderloin is a lovely place to stay (parts of it are a bit rough around the edges but NOT dangerous) - I experienced so much friendliness during my stay. And nowhere more than in Luz Hotel itself. The staff and family were the most hospitable I have ever experienced. Unfortunately, I broke my foot while in SF and would have been stuck if not for being absolutely drowned in kindness by Albert, Ver et al.