Monday >> The hordes will flock to DAR Constitution Hall this Monday night to mark the return of Death Cab to D.C. with Ted Leo and the Pharmacists. They recently added a second, Tuesday night show, but feel free to take your pick, as tickets are still available for both days. $34, 8 p.m. >> It’s black Monday in the district, as the nominal antithesis of the White Stripes, The Black Keys, complete another 2-day…