A Greenhouse Coffeeshop or Cafe sounds like a very relaxing space. There would be plants and light everywhere, which is perfect for hanging out -- with friends or by yourself -- or getting work done. Plants bring outside elements inside, yet you could be in a comfortable temperature and maybe listen to the rain on the roof. Lots of comfy couches and chairs would add to the chill atmosphere.
I was inspired by the Line Hotel's famous rooftop deck in Southern California, a beautiful restaurant. Also always wanted a greenhouse-like room in my home. Feel the restaurant vibe would be perfectly translated into a space for coffee. It would have to be large enough that all -- coffee, plants, and people -- can coexist in one space.