FRIDAY: >> There’s another Hirshhorn AfterHours event planned for tonight, when the museum stays open late for a party, this time featuring DJ Spencer Product in a celebration of the new exhibit Wolfgang Tillmans. $10 in advance, $12 at the door, 8 p.m. to midnight. >> KRS-One is “The Teacher” for a reason — besides being an over-40 MC still preaching against violence, misplaced hatred, and government corruption, he’s also been a crucial influence for…