This is similar but different to another thread in this forum ... different enough that I'm making a new one. The query is how to not make a world seem empty. You have your main character(s), a few supporting characters, and then maybe a few targeted tertiary characters that the others interact with. But, in reality, the tertiary and "extras" characters should FAR out-number the main and secondary. For example, your main character is at a restaurant with their significant other (main, secondary/supporting). They may be seated by a nameless host, order from a nameless waiter, and have to talk over the din of 100 other people. I may be seeing all that in my mind when I write out the scene, but how do I get the readers to subconsciously acknowledge that, yes, it's not just these two people in an otherwise empty restaurant? Another example could be walking down the street. Main character walks down the street in the early morning and goes into a store. Right there, I've completely isolated the main character and the world seems empty. What methods/techniques do you use for filling your world without making it seem as though you're trying too hard?