Usually, for normal sized quail, ie Bobs and Coturnix, you want one square foot per bird in my experience. You can cram 100 of them in if you like, but its makes hygiene difficult and causes stress on your flock, making them prone to disease and reducing fertility. Also, cannibalism occurs especially in Bobwhites. Further, if you cram them together like that, your Coturnix females won't have a feather left on them. If feeder space becomes scarce, more fighting. This is why many battery cages are about 2.5 sq. ft. for 3 birds.
Anyway, that's just my humble opinion, and others will differ. Quail are living creatures. They provide food for me and my family and I treat them with respect. Before I slaughter them. : )