Baltimore’s electro-music man Dan Deacon will perform a show live at the Hirshorn tonight, the last installment of the museum’s “After Hours” series. Advance tickets are no longer an option – arrive BEFORE 7:30 p.m. to snag a ticket for $12. They’ll most likely sell fast. The event will run from 8 p.m. to midnight. The show starts at 9 p.m.