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It could get very "interesting" if you take 4 point of lay standard sized hens that are complete strangers to each other and suddenly stick them in the tiny coop/run pictured in the first post. Interesting as in "bloody."
Chickens have a well established social structure every bit as complicated (perhaps even more) than wolf packs. When you force a group of chickens who don't know each other to live together suddenly in a small, enclosed space, they have to work out their pecking order. The way they do that is by confronting and sometimes fighting with each other. If the losers in these battles can't run away (because there's no space), they may get mercilessly pecked by the victors, to the point of blood letting. And when chicken see blood, even on one of their own kind, their predatory instincts can take over. They're modern dinosaurs, after all.
To be perfectly honest, there is no way I would put 4 adult birds who don't already have an established pecking order into a run as small as that. You might be able to take 2 or 3 birds who have grown up together and put them in that run successfully, especially if they're a breed of chicken that tolerates confinement well.
The adage "birds of a feather flock together" is true for chickens. If you do get different breeds, makes sure they're all different so that no bird is the "odd chicken out" in the flock. I was originally going to get three chickens, all different breeds, and this is the advice a very experienced poultry keeping friend gave me. He told me that the singletons he's had in his 20 plus years of keeping chickens always seemed lonely compared to the chickens who've had those of their own kind to flock with.
I ended up getting my original flock from this person as day old chicks, all Serama cross bred bantams. They all look somewhat alike, but I still find watching the flock fascinating because the personalities of each member of the flock is still as individual as a fingerprint.
If you've got limited space, and you're not really that interested in getting chickens for the eggs, consider getting a couple of bantams. You'll still get eggs, but they'll be small, but so will the chicken droppings!