@libroraptor @nddev @Kay @anne_twain @Gustodon @georgepenney as recently as 25 years ago, libraries *were* "quiet hours" in most places in the US. Then they started moving to "quiet rooms" and not particularly enforcing even that.
Perhaps this does get more people in the library, though I'm not among them. These days I just checkout ebooks, or occasionally reserve something and go in and out as fast as possible.