Don’t bring Mylar balloons. Don’t attach non-Mylar balloons to a park bench or tree. Same with pinatas, streamers and signs (a freestanding pole is required).
Want to grill? Get a permit from the Fire Department.
Want a jumpy house? Give the city a $250 deposit and make sure the company providing the inflatable jumper has $1 million in liability insurance. And if you’re dreaming about a pony at your child’s party, consider this: The city of San Francisco expects you to have a veterinarian on hand.