Mine are 5 weeks and sit on their perch for relaxing time, but when they actually want to sleep, they all fight for a spot in the corner of the brooder. The ritual takes about 30 min and is quite noisy. Once settled, they puff up, and the mass of them rather resembles a Tribble from Star Trek.
Mulling over whether I can let them free-range the backyard when I'm at work. We have a 5ft privacy fence that keeps out dogs, but IDK if these guys will keep an eye out for hawks or decide to fly out and visit neighbors.