I have a junior who is not yet driving.
Our curfew for him is dependent on the activity, and who is driving.
If I am driving, I will let my kid stay put until I run out of energy, usually around 1:00 AM, provided they are somewhere specific that I approved of. For example, at something like a cast party after a show, my kid could stay that late or later, but only if I drop off and pick up. If my kid is riding with friends, I would expect them home before midnight.