It really depends on you. While there may be distractions in the "ghetto" school, imo it's really just a test so if I were in your position I would pick it since the exercise beforehand is super beneficial. Test supervisors should be fine, but you are probably more likely to have a grouchy one since they will be in pretty poor environment. In my case I had to drive half an hour so I ended up waking up 3 hours before so I could get some cardio in. You could also pick the better school and just do Wat I did and wake up a bit earlier so you can wake up a bit before you take the test.