Sure, but it does likely mean that hosts should expect some surprise visits from the local health department and likely fines, because it certainly does require

Sure, but it does likely mean that hosts should expect some surprise visits from the local health department and likely fines, because it certainly does require at least a temporary food permit. Here are the relevant San Francisco requirements: http://www.sfdph.org/dph/EH/Food/Permits/PopUps.asp http://www.sfdph.org/dph/EH/Food/Permits/PopUps.asp