Asking about working hours is likely to provide some useful information. e.g. "How often do people stay late at the office?" or "When was the last time that you

Asking about working hours is likely to provide some useful information. e.g. "How often do people stay late at the office?" or "When was the last time that you had to stay late to fix something?". Employers may not be completely honest with their answers, but if they value work-life balance, then the answer will probably reflect this.