I used to do construction inspections/babysitting and this is only partially true on construction sites. Usually 2 steps into the zone I was getting workers wondering wtf I was doing and if I’d signed in yet. Every once in a while they wouldn’t care and this was usually smaller sites.

You don’t need charisma. Actually, charisma might hurt you here, since a lot of maintenance workers don’t interact the same way that office workers do.