Situation: I am seated by the table facing the whiteboard. There is a chair on either side of mine.
Alternative situations: I just sat between two other chairs facing the whiteboard to wait for the teacher to arrive. I am sitting in the middle chair, bottom portion of the table, writing notes down in my notebook on top of the table as I read the words on the whiteboard in front of me.
Question: Gotta dispose a coffee cup, which way should I go?