Two to try in Michigan
I grew up in SE Michigan, and returned recently for a visit. I rediscovered two of my favorite burger joints.
Krazy Jims Blimpy Burger in Ann Arbor is incredible. They had not changed a bit in the 20 plus years since I had last eaten there. They fry up little "sliders" on the grill (1/10 pound each), and then they put 2,3,4, or 5 of them on a full size bun. So you order a "double", a "triple", "quad", or "quint".
Then they have an amazing array of toppings, bacon, fried egg, fried salami, different cheeses, etc, and your choice of roll.
Then in the Detroit area is Travis, a coffe shop in St Clair Shores. They used to be a small chain, don't know if any others exist now. Great little sliders, again this place hasn't changed in 30 years that I know of.