If you walked into a large lecture hall and someone you are attracted to is already seated, where would you sit in relation to her/him? Let's say that nearly all the seats are open, and the classroom can hold nearly 300 students.
As close to them as possible but not RIGHT next to them
What Guys Said 1
One or two rows back and to the side, if possible with a good view of which ever side I considered their "best" and at the same time a good position to not be noticed by whoever's doing the lecture (in case I get caught up in an overly long glance/look).