Don't be surprised if management is late or keeps you waiting. They often do this deliberately to remind you who's in charge. Introduce yourself to and shake hands with everybody in the room. You need to know their names for your notes, and it establishes you as their equal. If the situation warrants, you can express anger or disgust, but always remain professional.
Some stewards like to be friendly.
If you decide to do this, warn your client so that they don't think you're changing sides.