Classroom or place especially in a school in which classes are conducted
Field is an expanse of open or cleared ground, especially a piece of land suitable or used for pasture or tillage.
Library is a large collection of books, and can refer to the place in which the collection is housed
A toilet is a sanitation fixture used primarily for the disposal of human excrement, often found in a small room referred to as a bathroom / lavatory
Office is a place in which business, clerical, or professional activities are conducted
or the administrative personnel, executives, or staff working in such a place.
Staffroom is a group or people employed by a company, individual, rtc for executive, clerical, sales works, etc.
Canteen is a snack bar or small cafeteria, as on a military installation.