Situation: I am sitting on a red chair. My backpack is leaning on the wall right behind me.
Alternative situations: I am sitting on the chair in bottom right corner as I talk on the phone with my forearms resting on the table in front of me. After entering through a door on my right and putting down my backpack in my 5 o'clock direction, I am sitting at the table and waiting for a meeting to start.
Question: Is the number of chairs surrounding the table in front of me odd or even?