When I was at Clemson, the Volleyball gym was a cave compared to the other venues. The soccer field and volleyball gym were a tossup on which was worse - horrible and recycling florescent lights in the gym or no light hitting the corners. Newer sensor technologies help negate these issues. Due to my past experiences I was nervous about a high school gym being worse: ISO 3200, 1/400, 2.8. About a full-stop worse than what I was used to. The 7D handles the low light well, but the Mark II definitely struggles with it.
The game was held at City College High School, which is a really nice public school in the northwest part of the city. The matches were fairly entertaining, with City College winning both the JV and Varsity city championships. A few photos from each below.



