When I get up from my desk and walk to the kitchen, I have to open the fridge and decide what to eat. In contrast, when I was visiting on-site at the office, each day's lunch was pre-planned by someone other than me, made by someone other than me, and all I needed to do was walk up and add food to a plate. Not having to expend much thinking on food was such a luxury, even if it didn't also have the benefit of chatting with coworkers.