I have two nest boxes in my coop not divided. At the current time I only have 5 hens however they all use one side of the nest box. I have seen 3 out of the 5 all huddled up on the one side. Go figure.
Really? That's so weird. I guess it depends on the birds. I just have heard of people that have both individual boxes and community boxes and they rarely use the community ones. I guess if it's all they had though they would. Mine tend to use the same one or two boxes now but will occasionally use the third or lay in the corner