There is a light attached to a motion detector in each room. You can turn this light off but you cannot turn off the motion detector. Therefore, if you toss and turn at night you will set it off and the light will come on. Repeatedly, all night long. There is nothing you can do about this.
After the first night I asked the front desk if there was anything I could do to switch it off and they said no. After the second night, I asked them (same staff on duty) if they had any duct tape or electrical tape to cover up the motion sensor, and they not only had some ready, they mentioned that a lot of people do this, which is to say, this is a known problem they seem uninterested in fixing.
Also the whole place reeks of old cigarette smoke.