Upon entering the tunnel, nationally known acts such as Chairlift, Walshy Fire (Major Lazer) and RJD2 will perform alongside Cincinnati favorites DJ ETrayn, Archer’s Paradox and DAAP Girls. Along with good tunes, there will be a car show, food trucks, beverages, a skate park and many more surprises. So, are you ready to cross off “underground party” on your bucket list? Free. Noon-midnight. All guests 18 and older must register on Eventbrite through goexposed.com. 220 Central Ave. Downtown, between Third Street and W. Pete Rose Way under the Second Street overpass (Parking Lot A).