[kelnos]

Being served lunch at the office is certainly convenient, and takes less time, but I wouldn't say it saves me time.

We have catered lunches 2-3 times per week. On those days, I will usually take about 30 minutes for lunch, and get right back to work. On other days, I'll take 45-90 minutes for lunch, and I'll get to take a walk, go outside, possibly see some of my non-work friends, and have different food.

The bottom line is that I'm going to leave the office at the end of the day at roughly the same time, regardless of the length of my lunch. That's almost certainly not the case for everyone, but, as a data point, it is for me. Lunch at the office only "saves" me time to get more work done that day. Don't get my wrong: I love my job, but I also love being outside and seeing friends too.