The Russian Wedding.
I could swear all the actors were actually drunk or half-drunk in that scene.
George Dzundza especially looked blotto.
According to documentaries the wedding was practically real. They invited locals who ended up bringing gifts and alcohol.
shareIs that right? Well, it worked well.
Every time I watch the movie, I watch for that one woman, who glances briefly at the camera in the scene where everybody's singing, as the bride and groom leave.