The featured work on this month's "Last Fridays" concert is Elgar's String Quartet in E minor, one of Elgar's last compositions and one of his few chamber works. Geoffrey Michaels and Phil Kates will open the program with a nod to Bartok on the anniversary of his birth: Selected Violin Duos. Philadelphia Art Alliance 5:30 p.m. Price: FREE Support for this program generously donated by Barbara Kates in honor of her dear husband, Henry, on the occasion of his 97th birthday