By Denny Dyroff, Staff Writer, The Times Rosu Lup Pennsylvania’s two major cities – Philadelphia and Pittsburgh – will both be represented by hometown bands headlining venues. Two of the many acts playing Philly on July 1 are Pittsburgh’s Homeless Gospel Choir and Philadelphia’s Rosu Lup. Rosu Lup, which is headlining a show on June 1 at Boot and Saddle (1131 South Broad Street, Philadelphia,...