On the national scale, none.
On a citywide scale, we have a chain called Crown Burger that exists only in the city in a number of locations. It's run by an extended family and their associates. They make a tasty burger. I'm partial to their pastrami burger, but I find myself ordering the junior version as I don't have the appetite I had in younger days. They make a good gyro too.
There's a wikipedia page that indicates they have two stores in Denver too. Hmmm. News to me. Crown Burgers - Wikipedia, the free encyclopedia
BTW, they're much faster at service than MCD's or the other chains. I've tried to count, but usually lose count at about 20 milling people behind the counter taking orders, cooking and cleaning. The lobby will be packed but you'll be served within about 5-7 minutes of walking in. McDs, has maybe 5 employees in the whole store, most of whom stand around doing nothing while you try to place an order.