This is key. As much as I can, I try to convince my brain it's a sunk cost. The main change in behavior for my wife and I is that we end up ordering wine by the glass at lunch and dinner whereas without a drinks package we almost always got bottles. Other than that, either way, we try to just drink what we want when we want it (including the occasional splurge on a high-end cognac or whiskey well beyond the price limit of the drinks package).