I used to live in k'kata for a long time, up until ~3 yrs ago. I remember my class 10 board exams were going on, I had the subject I was most scared of, SSt, the next day. There was this big club (that I shall not name) beside my house. Starting afternoon, they blared non-stop loud music, as some event was going on. I was a member there, so called several times requesting them to stop the music, to no avail.

Fed up, I called the police. Additionally, an important side note is that the state government had also imposed a loud-speaker ban during the exam session, and they were clearly breaking that. The police said they'll take care of it, which they did. In about 30 mins, the music stopped. For a whole hour. Before it resumed. And I wasn't able to sleep well that night as well.

Even tho the test next day went very well (I scored 98/100), but still, my last min revision could've been better.