A rowdy affair, this annual tradition features the University Symphony Orchestra and the University Philharmonia Orchestra hamming it up in costume while performing such ghoulish works as Saint-Saëns’ Danse Macabre or Mussorgsky’s Night on Bald Mountain. A large portion of the audience comes in costume. Note: Tickets usually sell out well in advance. 2 p.m., Hill Auditorium. Tickets $11–$25 in advance at the Michigan League & tickets.smtd.umich.edu, & (if available) at the door. (734) 764–2538.