The Haunted Hair Ball will be held at the Rathskeller 401 E Michigan Street, Indianapolis, IN 46204. Parking is available around the area. You can park all around Massachusetts Avenue, all are metered parking until 11:00 PM. There is also metered parking at the Rathskeller, first come first serve. Uber and Lyft are options for a good and responsible way to get home.
You can also visit the Mass Ave website for more parking suggestions.