Have you ever add to decide, you and your colleagues, where to go for lunch? Each time, it ends up being a committee, of course. It gets even worse when not only you have many colleagues, but also two offices, or two groups, at different locations. Since we work in a rather large city, we want to walk to the chosen restaurant, rather than drive, but in a way that is fair to either group.
So to settle the argument about where are the restaurants midway of both locations, we need a map, and some math.