Back in my room, I listened to music on my phone, but there wasn't much else to do but go to sleep.
I was surprised it wasn't very loud inside my room, especially because the hotel is in a relatively busy area and the walls of my room seemed thin. I could hear one person coughing in a room down the hall, and what sounded like a washing machine perpetually running on the floor above. But I didn't hear any street traffic or noise from outside, likely because my room was tucked into the center of the building without a window.
A hotel employee later told me over the phone that in the past, some street-facing rooms had windows, but now, those rooms aren't available and none of the available rooms have windows. The employee didn't specify what the street-facing rooms are used for now.
It was also a comfortable temperature in my room, neither too hot or too cold. I didn't see a radiator or device to adjust the temperature, so I assumed the whole building had a central heating system that the hotel management adjusted.
But it was hard to relax because I didn't feel totally comfortable or at ease in the tiny room. Luckily, though, I was tired after a long workday and eventually dozed off.