Another prospective NU student bumped into Jonas and blogged about the encounter:
Today I was visiting Northwestern University by Chicago, IL and around 2 PM after the school tour was over my friend and I spotted Nick Jonas and his dad who were also visiting.
Not many people noticed him because he didn't have big security or his other brothers, but he did take pictures with us. He was really nice, well-mannered, and shy. He thanked us for being fans.
The Jonas Brothers are currently on tour and play two shows in Chicago July 10 and 11.
(h/t Windy Citizen)