Possible Clues:

• Teachers' meeting place
• Teachers' lounge
• Presumably this is where the round table is for Sir and Miss?
• Instructors' place to provide walking aid, climbing rough terrain
• Schoolteachers' break area
• Place for members of school team who aren't in form?
• One could accommodate members of the NUT
• Teachers might be found here when not teaching
• Space for use by employees
• Teachers' haven!