Embrace the bone-chilling cold by stripping down to your skivvies and running with other maniacs at this one-mile dash. The shenanigans begin at The DL (95 Delancey St.), where participants meet before the race. Make the most of your endorphins at an after party and also feel good knowing your liberation is for a good cause: money raised benefits efforts to cure neurofibromatosis. Plan your laundry days accordingly. Find out more with our Cupid's Undie Run Guide.