I think the first time I ever wore a tuxedo was when I played at the Talk Of The Town in 1967, because it was a nightclub and that was the thing to do.
Realism is always subjective in film. There's no such thing as cinema verite. The only true cinema verite would be what Andy Warhol did with his film about the Empire State Building - eight hours or so from one angle, and even then it's not really cinema verite, because you aren't actually there.