You can find answers to many of your questions on the
Alkmaar section of this website.
Alkmaar is a 45 minute train ride from Amsterdam
I believe the train stops running around 1:00 am, you can find out details at
The Netherland Railways website in English
yes, the girls are in windows. The RLD is on a single street called the Achterdam.
There are probably more than 100 windows, you can count for yourself on the Kamer map link below.
Darwin's Alkmaar map
Alkmaar kamer map