The Dinner Party

Faster, Pussycat! Kill! Kill! (1965)
Dir. Russ Meyer

The Rocky Horror Picture Show (1975)
dir. Jim Sharman


from TrixRabbi, who adds: 

This works best with a bit of context. Both of these feature dimwitted strongmen who are unphased and continue eating meat at an already awkward dinner party after a major reveal that disturbs everyone else at the table.