I used to love sitting in the solarium playing cards. I think a sunroom/conservatory is a great place to relax. I think it would be awesome to have one that's so sunny I could grow plants there, like the greenhouse at the Chocolate Museum.
You can't really tell if this beauty actually is a greenhouse or maybe a gigantic indoor garden. But either way it is stunning and a huge inspiration on how to design one's one greenhouse with a little more charm than just the usual pots and benches.