Late Shift

On my first play through, i arrived at the scene with the drunks alone and chose not to fight. I then never encountered the scene in the van as when i went to the auction house, i got out before finding out the van number. I did still get the choice of going to the Tchois after getting the bowl from Parr's house but the achievement doesn't pop when going this route (like many other achievements that only pop through a specific route of getting there despite the same outcome - such as take 50/50 cut or not fighting the drunks)

So it's also important to go up in the elevator and continue on the computer when interrupted by the worker at the auction house. This will give you the van info and the van scene will play out