Avoid the Greenwich Inn at all costs
This was the worst hotel I've ever stayed in. No where do they indicate there is no air conditioning in any room. Just imagine coming back to your room around 3pm for a little nap, opening the door, and feeling the burst of stenchy heat hitting you in the face. Not to worry, you just turn on the crappy, disgusting little fan they have in the room for you. Sure, the nights are nice and cool, even in the spring and summer, well good luck sleeping. This "hotel" is at the corner of Stiner and Greenwich which has LOUD, busy traffic all night. Impossible to sleep.
The beds are horrible, sunk and worn. I pulled the night stand out a bit to look for a power outlet, YUCK! Nasty, NASTY! A dead bug, unidentifiable. And someone's old toothbrush.
Oh, and don't bother driving a car to this hotel. You'll never find a parking spot. Sure, they claim to have free parking, all of about 5 spots.
This "hotel" was the disappointment of my entire trip to San Francisco. Yes, I was on a tight budget and I did need to be near the Warf for a triathlon event, but no one should be subjected to a dump like the Greenwhich Inn. I wouldn't recommend this place to my worst enemy.