My friends and I are particularly fond of a wine called Evolution from Sokol Blosser winery in Oregon. It's soooooo smooth and easy to drink, that you have several glasses down before you know it.
So, for the cocktail party/drink fest, I had 1 1/2 bottles, bought 2 more, 2 other people brought 3 more bottles between the 2 of them. We had 6 1/2 total for the evening, along with an assortment of other wines. After about 3 hours, approx 4 people give or take a glass or two finished off the 6 1/2 bottles and more would have gone if we had it.
Every year after the party, my hubby makes a list of what we ran out of or are almost out of. He put all the alcohol on the list, and added Evolution to the bottom with a note "(Buy by the case next year)"