Exercise Equipment Everywhere

Did you catch that alliteration up there in the title?

You would think that people really like to exercise here using these particular simple machines considering they are all over the place. Except that I've rarely seen anybody using them. Except kids. They really love climbing all over them, or spinning on the rotating plates. I like playing with them too. But when I tried using them for some exercise I found that they didn't really fit my body that well. It felt all wrong. I suppose that's why there's all those adjustments on the equipment you find in modern gyms. 

What are these things? They're in every park and every apartment building I've seen. Always neatly tucked away in some corner. There has to be some kind of national organized exersize program that goes with these things. Required in all construction. If you know, could you please tell me? please? I'm really curious.

Thanks!