I frequently do my grading at the local microbrewery: they make some wonderful beers that you'll never find more than 30 miles from here. Besides, grading at work feels like work, and grading at home makes me feel like I'm working off the clock. Grading at a brewery feels like you're relaxing, but you happen to be getting some work done at the same time.
I'd been grading for probably an hour when a gentleman at a nearby table leaned over.
"You're grading papers and drinking at the same time?", he asked pointedly.
I looked at him and smiled brightly. "Of course!", I replied. "I find that their grades improve with each beer!"
It took him a moment, but he laughed and returned to his own beer.