I was seating next to two girls who student-rushed. They got their tix after failed getting rush tickets for another's show in the morning. I don't think you need to wait in line for POB's student rush, but definitely go to boxoffice in the morning. MTC's student rush and 30U30 are generally the same seating area, so I'd suggest you to get 30U30 in advance, unless you want to rush POB as a backup.