This is a three part optional mission that transports you to a time when Jason and his friends are inside of a club. You're able to view some scenes from right before their trip to Rook Island. You can trigger these by interacting with the flashing object in front of the ship Daisy is trying to fix. The first event can happen when you rescue Liza, the second after Oliver and the third after Keith.
The first event shows them in the club, with Grant telling some stories. Jason will get up, and Grant convinces him to go buy some drinks, with him paying for them. Go up to the bartender and order some drinks. After a toast, Jason will wake up back in the cave at Earnhardt's mansion.
The second event has you trying to find where Riley has gone to in the club. Go down the stairs and you'll overhear some people talking about Americans in the bathroom. If you go on the dance floor, you can dance a little, but it's nothing special. To find the bathroom, from the bottom of the stairs, there's a hallway to the right. Go all the way in the back to find Keith and Riley arguing with some people, where you'll butt in and break it up, waking up in the cave afterwards.
The third, and final, event has you starting out on the dance floor, so press the buttons on the screen to do some moves. Some guys will come up and start some trouble, so follow the button prompts to knock the one out. You'll run off and head through the back door. While you're in an elevator, the DJ will mention something about an island where you can do anything. This is where the beginning of the game starts.
