We would have similar things happen on a regular basis. There were semi-regular readers who would come to NYC two or three times a year to spend a few days doing research in the library.
We opened at 10 AM but these folks would be waiting outside when I reported for work at 8:30. Of course they wanted to come in and start work while I was turning on the lights. I understood their love of the place but it was a real imposition.
We also closed for an hour so the boss and I could have a decent lunch. These folks either wanted to continue working while we were closed or invited themselves to lunch with one of us and picked our brains the entire hour.
At closing time, they wanted to hang around and continue chatting for an hour or so. We had homes to go to and dinners to make.
There was one time I really had to put my foot down. Because of the traffic in and out of the library all day during the week, I got into the habit of coming in on Saturdays to spend a few quiet hours getting caught up on library business. One reader found out about this and showed up at the door with a happy, greedy smile.
Sorry, ain't gonna happen.