I would say they all look like prisons but if you look at prisons like Attica that were built in the 1920s you see that even there they built for beauty.
Water treatment facilities, Courthouse, factories, schools during that time were not only meant to be functional but also beautiful.
By the time the sixties rolled around the Anti-beauty we imported from Europe were in charge.
Private companies did manage to keep things fun and playful up through the 1990s when more and more companies were being taken over by conglomerates like Unilever.
And that was the end of beauty, fun and whimsy.