Anything to make a buck. The meter maids go into a FEEDING FRENZY on that weekend, writing tickets right and left, down at the Marina where everybody leaves their car double-parked, triple-parked, etc, at the foot of Fillmore Street. People just walk away and leave their cars parked illegally; they don't care about the tickets. The city probably makes a ton of money on that weekend, much of it from parking tickets.
That would be a money maker.