I saw on TV about three or four years ago in the UK.
It was a re-showing of a much older performance. The original may have been made for TV or it could have been a filmed performance of something that was originally a stage play.
The setting was a 'civilised' party with the hosts and with guests that arrived and interacted.
I would say it was set in the 1960s - in an apartment or house with contemporary furniture - an aspiring middle class setting.
It maybe had an American feel to it - like it was set in the USA - modern apartment - maybe not.
From memory, the whole play may have been silent - as in, no spoken words - just gestures and expressions or perhaps the characters mouthed words.
In the play we get to see into the psychology of the individuals - jealousy, fear, arrogance, disappointment - all of it under a veneer of civility.
The way people moved around in it, it was almost like a ballet - the whole thing was very stylised and intended to be insightful and realistic about the inner workings of how people interact.
It was almost balletic, very mannered - the way people turned and gestured and took their coats off and offered and accepted drinks - and through all that, the real inner cruelties, jealousies and disappointments were visible - attempted to be hidden but seen by us the audience - and sometimes by the other characters.
If you know the name of the play, plase let me know.