1949 era Donut Chain

Factual Questions
1

had quite a few outlets around city then…all the same, with the sign next to the front door, in Italic Scrip…

As you ramble on through life, brother
Whatever be your goal
Keep your eye upon the donut
And not upon the hole

Can someone recall the chain’s name?

2

Can’t help with your question, but the text seems to be patterned after the Burma Shave billboards of that era.

3

WAG–Mayflower Doughnut Shop.

http://webcache.googleusercontent.com/search?q=cache:IJ7bUnvWOLAJ:www.barrypopik.com/index.php/new_york_city/entry/keep_your_eye_upon_the_donut_optimists_creed/+"mayflower+doughnut"+chicago&cd=1&hl=en&ct=clnk&gl=us&source=www.google.com