Cupid's Undie Run made a Detroit stop on Saturday to raise funds to research neurofibromatosis, a genetic neurological disorder that causes tumors to grow on nerves throughout the body and affects 1 in every 3,000 births. The event kicked off at Detroit's Tin Roof with some drinking to help get people in the mood, then commenced for a mile run around Comerica Park and Ford Field that returned to the Tin Roof for a nearly-naked dance party. About 200 people showed up and braved the cold for a good cause.