Parking is going to be a problem. Even with something the size of the Smart car parking SF is going to be a gigantic pain.

I have a friend who lived in the Outer Richmond and we'd meet up from time to time. He'd take his car because it's the Outer Richmond and transit is basically non-existent. Conversations when we meet up would go something like:

"I'm here in front of the restaurant"

"Be there in 5. Looking for parking."

[5 minutes later]

"Hang on..."

[15 minutes later]

"Okay, got a spot. See you soon."