Yep the Sportscard changes colour each year I'm afriad...
The gym on campus is pretty grim. Very small, gets very busy during the day and therefore very hot and sweaty! Best time to go is first thing in the morning (ie. when its just been cleaned!) Stick with the main gym at Manor Road if your living at halls in Oadby.
There's a Cannons on the main uni site, which is lovely, albeit a bit pricey. Has a swimming pool, sauna, steam room and loads of equipment. Classes are good too. There is usually a student offer at the start of each academic year - 12 weeks membership for £99.