In San Francisco we spent 3 nights at Hotel Fushion. (You can look it up on Tripadvisor). It is a small boutique hotel. The room was very small even with just 2 of us staying there but it was super clean and close to everything that we needed. Our hotel was in Union Square and that means it was close to shopping and places to eat. It was a couple of steps to the cable-car station which means it was really easy to get down to Fishermans Wharf and other places we wanted to see. I highly reccommend it if you are on a budget and want somewhere cosy to stay. They also include a free continental brekky every day too.