I'm sure you already know about Rosamunde's hamburger Tuesdays but just thought I would add my 2 cents since I just had one today.
$5.50, 1/3 lb on a toasted onion roll, cheese, lettuce, tomato, ketchup, mustard, pickles, and grilled onions. And no mayo, YAY! Soooo good. There may be better burgers around but not at this price point.
But here's the thing: you need to be willing to wait a LOOONNNGGG time. Having passed by in the past at 12 and having seen the line snake half a block, we went at 2. No line to order but they were cooking up a storm for people waiting next door at Toronado. So the wait for the burger after ordering was something like 35 minutes. I can only imagine what the wait was like earlier.
And they ran out of burgers by 2:30 so do not assume they will have them at dinner.
This was a great burger but I think the wait and the risk they may run out has somehow ADDED to its culty appeal for a lot of people. I've seen people line up as early as 11:00 (they open at 11:30). I mean, it's a GREAT burger but to wait that long?