I can do most Sundays, afternoon is better for me as it takes me a good hour to get to from Westside.
Actually, is the track lit? I didn't think to check. In which case an evening after work could also be rather good.
Edit: looking at the slots the last bookable one is 17:30 on the weekend and 17:00 on the weekdays and the dates are going into October so I'm thinking it must be lit.