Open since 1958 chili cheeseburgers and onion rings .
Open since 1958 is pete 's No. 6 still serves the staples of the pre-fast - food era : hot dogs with chili .
Open since 1958 , Pete 's No. 6 still serves the staples of the pre-fast - food era : hot dogs with chili , chili cheeseburgers and onion rings .