Excellent advice and could be expanded with more tips for subtle prying... I will give it some serious thought the next time I'm headed into an interview. I must add that in 20+ years of diverse employment my favorite job, far and away, was the one where I had to sleep under the desk a couple of times. Fortune 500 company so "always fails at everything" is a bit too strong. :)
The trick would be trying to figure out ahead of time what on Earth might indicate it's a place you'd enjoy the odd 80 hour week.