Mrs. Kennedy has a glass of champagne. Jackie and Michael take Finn to the pub where they have beer. While they don't readily appear so, it's later commented that they were somewhat drunk. Later, Michael appears somewhat intoxicated from this. Meeting with the lottery official, Michael has several small glasses of whiskey.
Locals drink in the pub, and then do so again after a funeral.
Later, the townspeople are drinking again. Jackie, Michael and some others have liquor for a toast to Ned. We do see Ned's dead body, although other than being dead, there's nothing bloody nor gory about it. While it is played for laughs, Jackie and Michael's plan is to defraud the lottery by having Michael pose as the deceased winner, and they then get everyone in their town to go along with their ruse. Nonetheless, none of it's done in a meanspirited manner.