While I was a student in Athens, I actually attended a party that (due to noise complaints from the neighbors to the authorities) had to be moved. We had to coordinate the logistics of sorting out those sober enough to drive, those transporting the potables, and those who were, um, unable to produce identification demonstrating that they were, in fact, 21 years of age. (I'm sure they just left their wallets in their other pants.)
Honestly, it was a logistical feat every bit as impressive as an orderly military retreat to box up a party, move it to another apartment complex, and pick up where we left off, but the lesson I learned was that, all other things being equal, you'd rather not have to relocate a cocktail party in medias res.
I'm not the only one who learned that lesson in the Classic City. The World's Largest Outdoor Cocktail Party is staying put.