I think the Brethren (extreme fundie types) still get women to wear hats in church in the UK.

The other place you see women wearing hats in Scotland is in Orange gatherings like the big parades. I used to live in a heavily Orange/Protestant part of Glasgow, and it had a hat shop that looked like a throwback to the 1930s, both in styles and display. I think it's still there.

You get Afro-Caribbean churches in London where the women dress up much like Azizi describes.

The inauguration hat that caught my eye was Pete Seeger's. It looked like an invertebrate alien that had made a bad landing.