Maybe not quite an atmosphere

Most people have bubbles. Small ones, large ones, and ones that could encompass small planets. But when everyone is in public spaces, there generally is "accepted public bubble space" (APBS) meaning everyone acknowledges a small space where you do not tread. This APBS shrinks and grows as the environment changes. At a bus stop it grows, but on the bus it shrinks.

Likewise in food establishments where food is prepared in assembly-line fashion (Subway, for example), APBS remains relatively constant within the confines of the establishment.

That means you do not need to follow your ever-precious, made-only-for-me-vegetarian-with-black-beans-bowl all the way to the register when there are obviously orders- meaning people- are before you. When you bump the next customer in a Ray Lewis-like action, it is also acceptable to apologize.

A slight bump is always present, as we forget that there are people around us in a public eatery, and we like to follow our food as it is prepared. It's natural. What isn't natural is the bump and no-arm hug as it becomes obvious the person in front of you is not moving, can't move, and you have to slightly ease back. In your selfishness to enhale whatever concoction you've ordered, you have advanced the line behind you, and they, too, have to back up because they are fully aware of the APBS.

No idea what I'm talking about? Short (9 mins) extreme example.