In my line of work, I spend a LOT of time in hotels. Probably 90% of that time is during the day. It's not easy but I've gotten used to sleeping during the day. Sometimes there are a lot of noises that try to wake me up.
I can deal with guests who talk in the hallways, not thinking that there might be some people trying to sleep. After all, 99% of the world actually does something crazy, like sleep at night! I can deal with the traffic on the street. I can deal with occasional work projects, both in and out of the hotel. I can deal with a high school cheerleading squad practicing in the parking lot on Saturday morning before a state tournament.
I CAN'T deal with guests who are still partying at 4 AM when I am checking in. I CAN'T deal with a pack of junior high school age boys playing hide-and-seek unsupervised in the hallways of all three wings of the hotel. I can't deal with housekeeping staff that can't keep their voices down in the hallways.
And I ESPECIALLY can't deal with housekeeping staff that knock on my door at noon to ask if I need housekeeping services when I have a 'Do Not Disturb' sign hanging on the door! And then knocking three or four times if I don't answer. What part of 'Do Not Disturb' don't you understand!!!!!!