I’ve never been to the one in my home state of MD, but I went thru the whole list out of curiosity. I was pleasantly surprised to see that I have actually been to one of the places mentioned - Zip’s Cafe in Cincinnati, coincidentally recommended to me by CC’s @partyof5! The picture in the article does not look like a very good burger and doesn’t resemble anything that we had. Definitely a hole in the wall place, very dark inside with outdated decor, but it had charm and good service. Plus the burger was not only super cheap, but also pretty good!