Once you've opened the tear you'll find yourself in one of the many alternative realities you're yet to discover. Proceed towards the exit from the club. You'll have to fight your way to the door, eliminating police forces gathered in large numbers around the stage.
One of the things that will change in this version of Columbia will be a kinetoscope located near the exit from the club. In this version it can be found to the left of the Minuteman's Armory vending machine and it'll be treated as a new object - Vantage point #26. Leave the club to end this chapter.