My favourite was 4 room caretakers apartment (semi-circular!) in an industrial building used when I was there by a firm of removers for storage. There was presumably once a need for a 'watchman' in the original plans for the building. Underneath and connected, was a huge room that housed the original steam heating system. It made an excellent open studio.

But the best of all - as with all industrial areas - is that I could play music very very loud ;-) As an ex-record producer I like to listen in control room conditions. I still have those house-shaking speakers and amps from an old studio at home today. Sadly though, 3am sessions with Dark Side of the Moon are now a thing of the past...

You can't be me, I'm taken