You may sit outside the room and meditate while you wait. Never leave before a sit is over, except in emergency. Never have a pager or cell phone on, not even in vibrate mode. No conversation in the meditation room. No shoes or sandals in the room or sanctuary.
Socks are ok.
If you arrive early, and choose to enter the meditation room, go to your place, sit down and wait silently. Contents Decorum Always behave in a solemn, silent, deliberate way. Turn pagers and cell phones completely off. Turn off any wrist watch alarms. If your wrist watch beeps on the hour, turn it off.