Fashion University North, also known as F.U.N., is a fashion camp. It's where Blythe went to study fashion in Summertime Blues. It is only shown in Missing Blythe. Blythe didn't exactly enjoy her stay there, because the only thing that anyone bothered to talk about there was fashion.
It's exact location is unknown, but Blythe says it's upstate. It is a short flight or a long drive from Downtown City.