This was probably pretty stupid on my part, but I used some of the jungle themed benches in one of my zoos and didn't realize I had placed them backwards. The jungle themed benches have no back on them, they are just a flat bench. They look the same from front and back. When I placed them in my zoo I did not pay attention to the green direction arrow.
I had several of these benches along a path across from a nice gorilla exhibit. I was strolling through my zoo in guest mode, and when I came to the gorilla exhibit, there were a number of guests sitting on the benches, but they all had their backs to the gorillas. It looked pretty funny, but that's how I realized I had placed them the wrong way.
I guess the point is, if you use the jungle themed benches, and place them right up against a wall, or some other object, just make sure you face them the right way.