OK let's do the math:
A half-barrel keg is 15.5 Gallons.
15.5 Gallons x 128 Fluid Oz/Gallon = 1984 Ounces.
1984 Oz / 16 Ounces per cup = 124 Beers.
124 Beers / 3.5 days = 35 Beers per day
Doesn't seem too out of the question, I think they could do it. And since it's Natty Light, I think they'll be hurtin' from all the crap that's in that horrible beer. Not to mention pretty wasted
I hope they keep it on ice!!!
EDIT: Since my browser (Mozilla) rendered the page all crappy I didn't see that they had part of the math on their site until later....oh well