Sonic Drive In

We stopped here for a drink and bathroom break on a road trip. The drink was great, as drinks at Sonic always are. However, there is no visible bathroom. I asked our car hop about the bathroom and she said "um" then went for another car hop who said she had to ask the manager. After a moment the first car hop returned and said I could not use the bathroom because it was "after hours or something" (what does "or something" mean here, and since when is 6:15 on a Saturday after hours?). In short, this place doesn't have it together and doesn't let customers use their bathroom, which I think is kind of integral to a place I consider to be a road trip institution!