How to describe the setting?

Unnecessary is the key word here. You don't need a setting description, it isn't always necessary to have a description of the setting. I like it just as it is and I don't need a description of the setting to enjoy it. In fact, if there was one, it might just ruin it for me. Keep it as it is. I know what you're thinking though, you think you need to describe the setting so other people can see it too. But it's always good to let the reader use their imagination. You would only need a description if it was essential that the reader knew what the room looked like for whatever reason. If you really want the reader to have a better idea of the setting you could include subtle hints like 'he leaned across the table' or 'glanced at one of the many computers beside him'. Hope I helped :)