Sonic Drive-In

I actually went by this location around 10 a.m. one morning. Did not see anyone there. Opened the side door, discovered it was the employee entrance. I only saw one enployee inside leaning againat the wall while on his cell phone.
I went around to the outside service window and knocked on the glass and waited nearly 2 minutes, no one came to the window.
I dont know if I have ever seen anyone at this location before the noon hour. They apparently dont expect any customers before that.
Poor standards if they are suppose to be open before that.