Great bang for the buck!
I was just up in San Francisco to see Conan O'Brien, and I stayed at this lovely gem. For $63, my buddy and I got a room with two beds. Granted, they were only twin sized, but for a one-night visit, it wasn't that big of a deal. If you are going to SF to see a show at the Orpheum Theater or the Warfield Theater, stay at Hotel Britton. It's within walking distance to both. There is also a great bar called Jack's Happy Daze and a liquor store (both open until 2 AM) just a stone's throw away from Hotel Britton. In addition, parking is only $15! So you can get drunk, see a show, and have a place to park your car, and sleep in a bed for a reasonable price.