“Game Night” is, for the most part, a conventional, and conventionally vulgar, Contemporary Romantic Comedy With Lessons. Its central couple, Max and Annie, played by Jason Bateman and Rachel McAdams, are avid board-game-and-trivia enthusiasts who are stuck in the fertility department. They’re having trouble conceiving because Max’s sperm are, according to his doctor, insecure. That probably has something to do with Max’s inferiority complex about his older brother Brooks (Kyle Chandler), an ostensible hotshot who decides one evening to take Max and Annie’s weekly couples game night up a notch by staging a kidnapping mystery.