They could also make it reservations only, and control their price and speed.
I can guarantee you there are famous NYC restaurants in my neighborhood where I can get a table even if there are lines out the door or reservations are completely full.
You just have to live in the neighborhood and actually put some effort forth to introduce yourself to staff and maybe go occasionally when you know it will be slow (like during a snowstorm or holiday). It does require a good manager/host though.