Whenever I am working downtown, I make a stop at Jackson House for lunch. The best time to go is 1:00 or later because lines are out the door if you go at noon. Expect to wait a good 10 minutes for your burger - just because it's all made to order. And bring cash because they don't take credit cards. Despite having fantastic burgers, the fries are just so-so. Jackson House is only open on weekdays but it's definitely worth the trip.