Hi Sunnygirl,
It depends on what time your interview is.
When I was there, some people were done by 3pm. While others, such as myself, had an interview at 4pm, so I wasn't out till around 5..well i was actually done at 4:30 but I stayed to talk with one of the cute applicants who was waiting to get picked up 😀
But from what I understand, a 4pm interview is the latest interview for the day, so you SHOULD be out of there by 4:45pm.
Good luck.
- Focus