After classes ended for the day, students at Counterhex Academy were free to do whatever they liked. Facilities were open 24/7, so there really wasn't much restrictions on where they could go. Hell, there was a whole red-light district, given all the students here were above 18 in age.
The students could even stay at the Academy Campus, if they liked. There were, of course, certain Enchantments that activated after school hours ended to prevent students from touching and messing around with special equipment such as the Hexdroids, but even with those barriers in place, one could still go survey and explore areas like the Hexdroid Hangar Bay to their heart's content after school hours ended. They just wouldn't be able to touch the mechs.
As for me, well…
"… I take it you're going straight back to the dorms to rest?" Feng Mian asked me, a look of worry on her beautiful face.