Why is the music in many bars so loud that you can’t hear what the person next to you is saying? Because you go to bars to drink not talk, of course.
Because everyone is shouting, the bar becomes even noisier and soon people start to give up trying to communicate and focus on their drinking, meaning more trips to the bar, and more regrets in the morning. Of course this is exactly what bar owners are hoping for. People sitting around quietly nursing their drinks for hours are no good for profits. Talkers aren’t the best drinkers.
Actually I’m surprised something this obvious didn’t occur to me sooner… and I blame the alcohol!