The Philadelphia Orchestra’s summer series at the city’s Mann Music Center is taking a decided turn towards light pops programming, reports David Patrick Stearns. While orchestral summers are frequently lighter than winter programming, there’s no mistaking the direction the orchestra is taking, with fully 40% of the concerts scheduled for the Mann categorized as more pop than classical. Attendance figures from the last several summers seem to suggest that the orchestra, which is coping with a nearly $6 million deficit, will benefit financially from the increase in lighter fare.