First option. Sweep the main parts of the room. The high traffic areas. The spots that everyone will see. Nothing more.
Second option. Sweep everywhere. Pull out all the chairs. Get under the tables. Into the difficult to access corners. Get every crumb.
The first approach will get you by. Most customers won’t bother to look under the tables. Most customers won’t pay attention to the smaller details. And most bosses won’t either. They’ll be happy that you’ve done a good enough job. You’ve completed the task to a degree that allows the room to look clean to the average customer.
The second approach takes much longer. It’s harder. It also won’t get you that much more credit. Like I said, most people won’t check your work, so most people won’t recognise how good a job you’ve done. Their ignorance can be a boon and a burden.
But some people will. Some customers will notice the neglected areas and be displeased. Some will notice them and complain. A few will comment on the cleanliness, or lack of it.
Some bosses aren’t bothered. As long as the room looks good they’re happy. Others want the entire room to be spotless, regardless of whether it will be noticed. They care.
Thinking is like sweeping. If you do a good enough job, you can fool most people. You can leave the crumbs in the corner and they won’t notice. But under the scrutiny of better minds, good enough isn’t good enough. Your work will be exposed for what it is. Shoddy. Lazy. Half-hearted. Inadequate.
The upper echelons of any craft or profession are composed of people who will look under the tables. Of sharp, inquiring minds. They will find the mess in your work and thinking. So my advice is this. Think like you sweep. Do the work thoroughly. Pull out all the chairs.