During lunch time, my company turns off the lights. I think that it's very good policy not only to save the energy and to give its employees resting time. I usualy take a walk for 15 minutes around my company just after lunch and take a nap for  about 20 minutes in the office after lunch. Even it's very short nap, it gets me refreshed after a short nap. Lunch time is my only free time I can use in my daily company work hour. So I try not to make any appointment or do any company work during luch time. Sometimes I can't help but work during this time then I feel very tired all the afternoon that day. Maybe other comapnies's pratices would be the same as my company. So I also try not make any phone call to my clients or even to my friends during lunch time. Lunch time is a really private time. I feel free for 1 hour. Without this time, I wouldn't continue my company life.  Happy Tuesday !!!