This looks like the kind of thing I often saw at regional Garden shows.
I have a garden designer friend in Novato, California who has created some wonderful spaces. Some of her work can be seen here: Michelle Derviss Landscape Design
Here is what I did to our much larger deck in the side yard. The answer to where the cushions go in weather can be seen behind the new shed to the right. I like that it is big enough to hold it all but mostly out of sight.
It is a lot smaller area for entertaining but then we rarely get large groups anymore and when we do there is always the back garden with other seating available.