The Party

From stage and screen director Sally Potter. And, yes, it is only 71 minutes long.

Janet gets a promotion and decides to celebrate with a small party of family friends. This turns out to be a bad idea, since her husband Bill is leaving her for their friend Marianne, who is in turn leaving their other friend and Marianne's husband Tom, and Bill and Marianne were hosted by mutual friends Jinny and Martha, who are expecting a baby. Janet, understandably upset about her husband cheating on her, texts her absent lover, and the whole night would be a shambles even without the drugs and the gun in the bathroom.

The Party is an acerbic black comedy, and a must for anyone wanting their guests to leave early.