When the Washington Post declared Wellness Corporate Solutions the healthiest workplace in the Washington, DC area -- how's that for a shameless plug? -- several of our current employees said that simply working in our office had made them healthier. I call it positive peer pressure: if your coworkers eat well and junk food is scarce, you might be less likely to bring in fast food for lunch. It would just seem out of place.
Physicians Committee for Responsible Medicine (PCRM) has gone about fifty steps further by actually banning all food that isn't vegan. (You can read all about it in today's Washington Post.) Every new employee is notified when they're hired that their office is a vegan-only zone.
It may seem like madness to some, but I see a method it it. PCRM has a clear mission -- to promote preventive medicine -- and they expect their workplace to reflect that mission. Whatever you feel about the policy, you have to admit: they certainly have the courage of their convictions!