Ladies and Gentlemen, the New York Public Library will be closing in 30 minutes. In 30 minutes we will be closing. If you need any assistance finding things you can ask a staff member for then next 30 minutes when we will be closing. The elevators you use to leave will be operating until closing. The checkout stand to checkout books will be open until closing. The bathrooms in the library will be available until closing. Returning books within the library is available until closing.
Here is a much shorter way of saying the entire speech they just said:
Ladies and gentleman, in 30 minutes we'll be closing.
That is unless in this library there's just one random thing that's always open past closing. Maybe they should look in a dictionary (found in reference section on the second floor) to understand that closing the store means closing everything within... they don't need to individually close everything.