Another up and coming chain is Elevation Burger, which specializes in grass-fed, free range beef and all organic ingredients.
There used to be one in Germantown, but it didn't last very long. It was a prototype store with a conveyor grill. They'd take your order at one end of the conveyor and put your burger on the moving grill. By the time it reached the other end, it would be cooked. Apparently it wasn't a successful experiment because before the store went under, they replaced it with a regular grill. It was pretty cool, though. (They also had a weird incident where they sacked the original manager because he overstaffed the restaurant.)
This location of the franchise was in Potomac, Maryland.
As you can see, they do the double-patty like Five Guys. Also, lots of lettuce, which, I am told by a friend of mine, is an abomination on a hamburger.
This was a good burger, but much the same as the other quality chains like Five Guys and Smashburger. I don't like this much meat and so it loses some points for the double patty.