At your expense

According to the company’s expense report policy, alcohol may not be expensed unless a Vice President or above is present at the event and approves of the expense.
This makes for a very difficult situation if the Vice President is giving you such a hard time at the event that you are driven to crawl away and drink yourself stupid. Because the next morning, when you sober up in a pile of empty bottles, it’s going to be difficult to get approval for the expense.
And that’s assuming you wake up with receipts in your pockets, let alone your pants.