My family lives on the second floor facing the street, and there is a billiards player downstairs. It's been noisy every night for more than half a year. How to keep them quiet?

Hello, first of all, I sympathize with your experience. Secondly, you need to find out if he has legal procedures or something, that is, if he is indoors, is his business license a billiards business? If the sidewalk is occupied outside, it is a matter of municipal administration and urban management, and you can call the police in the name of noise disturbing the people. Ask them to control the sound as much as possible or not to drive at night (this is unlikely from the merchant's point of view). I hope to help you solve your troubles as soon as possible.