Lums, Shakeys, Nickel Nook, and Scotty's

I lived in Portland, Oregon during the 50's and they had a chain of hamburger joinst called Scotty Burgers. How long did they last or are there any of them still left.
Also in the Midwest was a chain of hamburger stores called the Nickel Nook Restaurants. Hamburgers were a nickel. Great snacks after swimming or playing ball.
I remember a Lums restaurant at Indiana University which was a pretty good place to "study" after playing tennis.
Shakey's put out a set of baseball cards with their pizzas in the 70's. Wish I had a complete set now. We just pitched them. Bdet they are worth a few dollars.