The next man free
You do not pick a barber here. You sit down, and when a chair opens, that is your chair. It is the only arrangement that lets a walk-in shop move at all, and it depends completely on the three chairs cutting to the same standard.
That is not automatic and it is not modesty to say so. It is what the apprenticeship is for: two years in this shop watching, sweeping, and cutting under somebody’s eye before taking a chair, which is how Joe’s father learned and how Marcus learned.
Unless you ask
You can ask for a specific chair and plenty of regulars do, particularly for beard work with Marcus or a razor shave with Joe. Say so when you come in and you wait for that chair specifically, which on a Saturday can be an extra forty minutes.
Nobody in here takes it personally in either direction. Sitting down for whoever is next is normal; waiting an hour for the man who has cut your hair for eleven years is also normal.