My health-focused workplace (in the public health sector) has this rule. Their idea is that lunch breaks should be taken away from your desk. There are tables in common areas, and a special kitchen on a different floor with seating to direct everyone to eat in only specific areas. Unfortunately, a lot of people still skip lunch. I think the fact that you need to go to a different floor to heat up your food deters some from taking the time.

Interesting article!