I stay at this FS in SF everytime I'm in the city. My kids are older, so a regular room is not really big enough for all of us. The executive suites are more comfortable for us.

The king-bedded regular rooms are quite small, and I am not sure a crib or rollaway would fit comfotably. IIRC, this hotel does not have any 2-bedded rooms, or if they do, they are twins. I don't believe the RC in San Francisco has rooms with two double beds either, just twins -- which they usually offer at half price when the parents stay in another room.

The Clift Hotel has larger rooms with two doubles, although I would not recommend this hotel for small children.