When I was gainfully employed in the hotel business, we used to throw a huge one for employees every year. We had a few hotels, so we'd combine a coupla properties each time. Kegs and casinos was the best ever. Employees could bid on stuff like a big screen TV, boomboxes, DVD players, etc. with their winnings.
Of course, being management, I had to work all of them. But they were real fun even for those working. Good thing they were in the hotels where we could assign rooms for those too drunk to drive (all of them).