The staffroom is located on the ground floor. It is guarded by two stone Gargoyles that can talk. The room is very long and has mismatched, dark, wooden chairs.
In this room, teachers can eat and mark papers. Sometimes staff meetings take place here too.
You may have heard of Professor Binns. He was the former professor of History of Magic. He fell asleep near the fire in this staffroom and when he woke up, he was a ghost. This, however, had no discernible impact on his workrate, teaching methods or popularity with the students.