So I've been having some minor hearing trouble with my left ear, and last night it became pretty obvious that it's due to an infection or the like. So I figured I'd go to a Saturday clinic to get it looked at (I am between doctors right now). Of course, St. Luke's Hospital (whom I've ranted about so many times in the past) no longer lists their clinic hours on their website, and only provide a phone number; calling that phone number just results in a message that says, "Our office is now closed. Please call back during business hours." They never state what those business hours are.
My health insurance provider's website also doesn't provide hours of operation for any of the doctors in their directory. Searching the Web is an exercise in futility; San Francisco has so many special-purpose clinics that those dominate the search results for any search on "clinic" (Saturday or otherwise), and searching Yelp for "doctor open Saturday" finds a bunch of restaurants which have one or more reviews including the word "doctor" or "Saturday" (e.g. "went here for brunch on Saturday") and plenty of other non-doctors (e.g. chiropractors).
It's like this xkcd, except about things in real life.