I wanted to second the recommendation for the Carl Hotel (it's also listed on the UCSF visitors page mentioned). It's on Carl and Stanyan St. They have inexpensive rates (and they used to have discounts for UCSF affiliates, possibly still in existence). It is WALKING distance (yes, even in my heels...really depends though, on your level of fitness & comfort) to campus. It's small and not posh, no frills, but there was a fridge and TV, and choice of private or shared bath (small price difference)...it fulfilled my needs for the interview weekend.