Private bedroom in large apartment/flat in Cole Valley, San Francisco. There will be two roommates, plus you. The apartment has three bedrooms, a dining room, kitchen, and library room. King-size bed. Well-furnished interiors. Easy Muni access, including Muni to CalTrain. The room also has a nice (hammer-action) piano keyboard and guitar, if you want to play.

Let me know if you have any questions, and check out the pics! (I have more.)
First picture: Dining room (common space).
Last three pictures: Inside your bedroom.