Twenty-one or over, on the first visit and the tenth
Everyone who books and everyone else present must be twenty-one or over, and she may ask to see a photo document at the door on any visit, regulars included.
The age rule is the same for every booking and does not wear off with familiarity. Whoever makes the booking, and anyone else who will be in the room, must be twenty-one or over.
How it is checked
At the door, by a quick look at a passport, identity card or other official document with a photograph and a date of birth. It is handed straight back. Nothing is copied, photographed or written down, which is exactly why a check on a previous visit cannot stand in for one tonight.
Why a regular may be asked again
The woman at the door may not be the one who looked last time, and the people in the room may not be the same either. The check is per visit, and whether she asks is her call.
If it cannot be shown
If anyone present cannot show they are twenty-one or over, she leaves before the session begins. The age statement gives the rule formally.