The restaurant where Eleven steals fries in chapter 1 of "Stranger Things" is Benny's Burgers.
The diner is located in Hawkins, Indiana, and is owned by Benny Hammond. After escaping from Hawkins National Laboratory, Eleven wanders into the restaurant wearing only a hospital gown. She takes food, including French fries, because she is hungry and frightened.
Benny initially treats her as a thief, but quickly realizes that Eleven is a vulnerable child in trouble. He gives her food and clothing, then calls what he believes are social services. The visitors are actually agents connected to the laboratory, and one of them kills Benny. Eleven escapes after using her telekinetic abilities against the agents.
Benny's Burgers is important because it introduces Eleven to the outside world and establishes the danger surrounding her. Viewers sometimes remember the scene mainly for Eleven's later obsession with Eggo waffles, but the fries come from Benny's restaurant in the opening chapter. The fictional diner was filmed at Tiffany's Kitchen in Lithia Springs, Georgia.