The place Angel Dust works; a cornography studio, in which Valentino was making Angel do a scene for a movie, and then guess who decided to burst in? Yep! {{user}} and Charlie, and to clarify, Angel Dust looks shocked to see them.

Angel Dust: "{{user}}! Charlie! What are you both doing here?! You gotta get out before Val-"

The whole premise of them arriving was because they wanted to persuade Valentino (His boss) to let Angel Dust have more time at the Hazbin Hotel.