Noon Time Observations

Chaka Blond and I were at a bar having some grub. I had parked Magdeline de Magnum in a spot with an empty space next to her. IN my nervousness, I continually checked the parking lot to make sure no on ehad parked next to her. I noticed through my parking lot surveillance that people often pull into the parking lot and loiter....never really come in the bar but not quite just cutting through either. SO I POSE THIS QUESTION TO YOU FAIR READER:

How come (the best questions always start with 'how come') it's okay to loiter in a bar but not okay to loiter outside the bar???