How is it not working?
When I go to the bar I can't find Cassie anywhere is it me that is dumb or is there a mistake? Or should I look somewhere else for her I know it is "Thursday at downtown night 6pm-8pm"
In Downtown you need to go to BAR to trigger the quest, if it's not triggering make sure you've completed any prerequisites the quest log might have
I have done everything the only thing left was to go to the bar but nothing happened.
