Well, at least for this particularly oddly-shaped piece of real estate on Main Street near Folsom, the answer is this many:
“Last in, first out.” Click to expand.
It might be a pain to park here, under the shadow of the new Infinity San Francisco towers, but at least you won’t get the boot, or get into a chain reaction accident, or get all messy. Of course, if you work for San Francisco Honda, then just park wherever - the sidewalk, for example.
Lastly, DO NOT PAY THIS MAN!
Now you’re all set.