This is one of the very rare times I've gone into a film literally knowing nothing about it (besides the cast), not having seen a single trailer. Anyways
"The Dinner" contains an interesting premise, and some fairly compelling scenes, as well as four rock solid lead performances (and perhaps a career best one from Steeve Coogan), but it's eventually considerably booged down by drawn out flashbacks that rather than really giving more depth to these rather insufferable characters start to become more repetitive after a while, which really unfortunately just derails the tension and at least interesting set-up that is going on in its present day sequences. Not to mention it contains one of the most absurdly abrupt endings/final scene I've ever seen, it literally just stops, which really just made me question what exactly was the point of everything prior. Worth a watch, but a pretty frustrating one.