Formed nearly 40 years ago in Bethesda, the progressive bluegrass band Seldom Scene remains especially popular in its hometown region. They appear tonight in a joint jam with fellow decades-old bluegrass band Dry Branch Fire Squad from California. Saturday, Nov. 27, at 7:30 p.m. The Birchmere, 3701 Mount Vernon Ave., Alexandria. Tickets are $29.50. Call 703-549-7500 or visit birchmere.com.