Wienerlicious

From Chuck Wiki

Wienerlicious is a gourmet hot dog franchise located in the same complex as Chuck's Buy More.

To keep an eye on Chuck, Sarah Walker uses a job at Wienerlicious as her cover. She takes the job in "Chuck vs. the Helicopter". To communicate with their CIA and NSA superiors easily, a hidden monitor and comm station is is built into the main countertop, accessed by pressing cash register keys "7-2-1-0-Enter"—at least in "Chuck vs. the Marlin."

The exterior shots are of the Stargazer restaurant located in the Fallbrook Center in West Hills, CA. This is the same shopping center as the Meryns used for the exterior shots of Buy More.