My experience with a bachelor pad is somewhat limited. I typically raise several cockerels and pullets with my flock without issues, but every three of four years the cockerels get rowdy enough I separate them into my Grow-Out coop/pen, usually around a dozen cockerels. I normally keep them in there until they are maybe 23 weeks old, when I butcher them. That grow-out coop/run is right next to the main flock, only separated by a fence.
I very seldom see any fighting in there although the pullets tend to hang around outside that pen, they miss the boys. The very few fights I see are more like minor pecking order skirmishes, not the all-out flock dominance fights I see when they are out with the main flock. It's amazing how much they calm down even just across a fence from the pullets.
On the other hand, one year they were all ranging with the flock one cockerel took an intense dislike to another specific cockerel he grew up with. They were around 4 months old. He killed that other cockerel although they were not tightly confined. These were not games but were Buff Rocks.