I can't believe how many restaurants have bathroom door locks with "twist the little knob to lock or unlock". If you go to any hardware store, you will see that bathroom door locks always have a pushbutton to lock, and unlock when you turn the knob. But of course the really best thing if you care about your customers is a plain knob with no lock, and a separate airplane bathroom door type lock (except usually they rotate rather than slide) that shows "VACANT" in green or "OCCUPIED" in red. I mean, why not respect your customers, and why make your staff endlessly try the door handle (picking up germs) in order to find out of the bathroom is free?
