You learn more about a coworker in the last hour of a closing shift than in a month of openings.

The last hour of a closing shift is an accidental interview. Everything pleasant has been used up, the customers are gone, and what is left is two or three people deciding how much of the work to actually do. You learn who disappears to the back, who takes the job nobody wants, who talks to you like a person once the performance is over. Mornings tell you almost none of this.

Use the hour deliberately. Ask somebody one real question while you are both mopping. And notice what you reveal in that hour too, since they are learning the same things about you.