Princeton Arch Singing
Every two weeks there is an event called Princeton Arch Singing taking place in one of the old archways on the Princeton University Campus. We went there yesterday.

Several different acapella groups performed music. The songs ranged from classic to modern pop. While some groups focused solely on the singing, others performed real shows like the one above. Some of the singers were astonishingly good! The whole event takes about 2 hours. If you happen to be in Princeton for a Saturday night you should check out if such an event takes place on that evening!