Outside Gym ... for pigeons ?

Free gym anyone? An set of exercise stations have been put up in the park by my apartment. I love this kind of public service initiative - and it fits with my goal of wanting to drop about 10 kilos over the next three months. Why is it that the first two or three are so easy to drop but after that you have to eat about only one pea a day if you want to shred any poundage?

Anyway, now that there is this free gym outside I can start using it. Looks like the only other ones using it our the pigeons. However, I think those pigeons would be much happier in a place like @hendrix22 built for his chickens.