We rehearsed for on full day - 12 hours. Then shot it the next day.
Four partial takes (one of them cut 18min in when the StediCam operator backed into a chair), three complete takes. A 22 minute shot.
You should have seen that set. Operator, wireless boom (actors were all mic'd too), wireless follow focus and me with a wireless clamshell. Four crew and seven actors all doing a silent dance to make that shot happen.