Could we maybe have an overlay which shows the radius of how certain buildings affect guests before we place them? (So instead of placing it and then looking at the negative effect option it would show you before you use money to buy it). Like how the transformer shows how large its power radius it is when selected to place, it would also show the small red ring inside it to represent how far you should have it away from guests. It could also be used to show how effective food shops are in a radius as well (So you can see how far a guest would be willing to walk to it). Hopefully I made some kind of sense.