The Disco Biscuits have added a pre-City Bisco performance. The day before the urban festival, the group will perform at Baltimore, MD’s Baltimore Soundstage on October 4. As previously reported, City Bisco will take place at Philadelphia’s The Mann on October 5 and 6. A-Trak, Paper Diamond, Diplo, RJD2 and Papadosio are among the support acts slated to appear at the inaugural fest. The Biscuits have played only a handful of shows in 2012. All tickets will include a free download of the show.