I think the closest I had ever been to a school fight was in two occasions: one being in the halls of the school - there was just this giant circle of people and two in the middle, probably punching and kicking at each other. I wanted to get a bit of a closer look --because I was a grade 10, and it would have counted as seeing my first ever highschool fight -- but then the principal magically appeared and I just did one of those awkward exit things.
Another time had been while walking home. Saw a fight happen across the street in a parks soccer field.
I'd say that I would try and stay away if I could, though sometimes I do get curious and wander a few inches closer.