This evening, looking for a place to buy some mailing envelopes, I dropped into a Postal Annex mailing service near my home that I had never patronized before. As I approached the door, being sensitive to the fact that it was late, I immediately saw that the store hours clearly indicated that they had been closed for 30 minutes.
As I turned to leave, someone inside the store hastened to unlock the door. I assumed at the time that he was going to apologize and explain that they were closed (the typical "courteous" response to such a situation). To my surprise (and delight), he immediately, said, "Yes, we're closed, but please come on in!"