Easy. In the game press Esc -> Item -> Key Item -> Cheat skull. Then you can change the parameters: corruption, cum addiction, silver, bread and day/night change.
First you need to have a some game progress in the bar. Then turn to the woman-laundress who gives work. She will say how much it costs (30 silver if I am not mistaken). After payment in the inventory appears the desired costume. When working as a waitress in a bar, this costume is worn automatically, visitors offer to remove the top part for the tip. When working as a dancer, Victoria puts on her old clothes.