When I was a kid my hometown still had a drive-in A&W. I loved getting food served to us in the car! I don't know why that should be so awesome but it totally was. The girls who worked at the A&W weren't on roller skates but back in the 50's it was common...it sped up service in the then new fast food industry. Check out the book CAR HOPS AND CURB SERVICE by Jim Heimann for some fun history, if you're interested in that sort of thing.
This is entry number three in the continuing theme. I badly want to pun on the phrase "working for scale" but can't really figure out what the phrase means...and if it only applies to actors.