A bug in the office turns into a dragon in a cafe? Because the "white noise" can keep you focused.

Everyone in the city knows that going to a coffee shop is not just about drinking coffee, in fact, most people probably don't care whether they are drinking Sumatra or Yegashafi today, and they go to the coffee shop just to be quiet. But here's the problem. There's a lot of noise in many coffee shops, and it's not quiet at all.