We have several doormen which definitely helps but if that overhead is too much, video is a fine deterrent and if anything happens, there's images of it. My two cents.

An empty lobby is the extreme, last choice. I think ideas from hotel lobbies is a great one. I suspect the furniture that can be will be too bulky to steal quickly or secured in place. A kind of mural instead of hanging art is also good for the same reason. I was thinking about how office buildings and shopping malls handle the issue. Many of them secure frames to the wall for liability reasons. (Won't fall in an earthquake or if someone bumps into it.) Benches and trash cans tend to be extremely heavy or chained to the floor -- sometimes hidden, sometimes not.