Here's the follow-up: I went to the game last night, arrived at the USC parking garage (garage #2) with 123 miles left in the tank. They had 4 Chargepoint stations, nice wide spots dedicated for EVs and very clearly marked to prevent ICEing. I left several hours later with a full battery and a $1.62 charge on my Chargepoint account for the "Session Fee". I have no idea how this amount makes sense. Parking was $25.
Just one other Model S charging beside me, and the other two spots were probably free for the entire game. No Supercharger needed, which was very convenient.