Over winter break, a few friends and I got a hotel off of priceline.com... $50/night at the Grosvenor Suites on Nob Hill... you get a kitchenette, a living room with a sofabed, and a separate bedroom with two queen beds. Parking was $20/day though =\ I then went up again for V-day weekend and got two nights at the Hilton at Union Square for $100/night which was a rip because the room was tiny. Just try priceline.com it works really well.