California has 5, Ohio has 2, North Dakota has 1 and Michigan has 71.
This is Bob's Big Boy. I got the numbers from Bigboy.com.
Michigan is keeping a good restaurant alive.
For Frisch's Indiana has 6, Kentucky has 28 and Ohio has 70.
I never heard of Frisch's until today.
Both operate under the Big Boy name but Bob's looks like the food is better.
https://www.frischs.com/ http://www.bigboy.com/
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I grew up with a Bob's Big Boy down the street. We didn't go very often, as it wasn't taken care of, though. The seats had cracks in them and the bathroom was downright disgusting. Went down there recently. It's closed now.