California has some of the most advanced and intricate licensing and permitting in the nation. Strong and detailed environmental regulations mean extra licensing for businesses such as mechanics and healthcare organizations. Cities often take care of some of the most local issues like valet parking, while counties manage health permitting, particularly food businesses. California itself oversees many industries, particularly professions and businesses that affect public safety.
In California, taking your client or partners out for a business meal is a common occurrence. If the establishment is licensed properly then you are probably safe from getting them food poisoning.