If it's for the same company that does the 5 Guys, I did one and the kid behind the counter was very cooperative. He let me take pictures from behind the counter and answered my questions.
It was not at a 7-11 though, just a local chain convenience store. A lot would depend on the employee you encounter.
I was in and out in about 10 minutes but I took lots of extra photos just in case. Report was reasonable.