Dawn Donuts might be more what we are talking about here. The prototype store originated in Jackson, MI in the early 60's, with several clones following throughout Michigan and Ohio - some still standing, some gone (the one nearest me is now home to a
Moe's Southwest Grill). Dawn Donuts was established in Jackson in 1920 and it was eventually bought-out by Dunkin' Donuts in 1991 (although the bakery name and a few independent locations still survive to this day). The Jackson location is the only building of this style to still operate as a Dunkin' shop
today, but others have found life with new owners. Click the
link to see the various examples - quite interesting to compare how they have changed and evolved -
Here is the Jackson location, in 1962, shortly after opening -

Source:
MLive
Here is a more contemporary view, after Dunkin' had taken over, but before the latest remodel (pre-2015). A lot of the windows were infilled -

Source:
Roadside Architecture
And here is the same location as it looks today. It's fun to imagine the Dunkin' Donuts corporate design team scratching their heads, figuring how to apply their latest design standards to this atypical form -

Source:
Google Maps