Wondering if a semi-open lowered ceiling would work in the Food Chapter restaurant part of seats2meet Eindhoven. It kinda reminds me of a garden pergola, it’s a bit more intimate, but not claustrophobic. Also it still let’s light through (there’s large windows on one side of the restaurant). From there my mind wandered to botanical gardens, and greenhouses, see pics below.
French garden (from http://www.home-designing.com/2013/03/traditional-french-country-home):
Botanical gardens are fantastic, not sure if it’s possible to replicate that atmosphere in a smaller space (from https://www.phipps.conservatory.org/plan-your-special-occasion/facilities-overview):
On a smaller scale, green houses! Greenhouse restaurant in Copenhagen (from https://www.bloglovin.com/blogs/gardenista-sourcebook-for-outdoor-living-3748417/vakst-a-greenhouse-restaurant-in-copenhagen-4886327168):
I like the wall texture here, giving it a more organic feel:
There are many variations on the theme, this is a bit more fancy: