Oral Exams

There was an essay in the NY Times yesterday about the virtues of oral exams for undergraduate or graduate students. I've always wondered about trying this out in a small, upper-level course. My smallest class had 5 students (in Admiralty) and they were a terrific group who would have aced an oral exam. But it was a night class and I didn't want to impose on them by scheduling another in-person evening session. The next time that I teach Admiralty, though, maybe this would work out. 

I'd be curious to know if any law faculty use oral exams and, if so, how you do that. Thanks.