For me: being around drunk people for hours on end gets very tedious and you're no longer desensitised to your eardrums being pounded into the centre of your brain by the "less talking, more drinking" music volume.
God the absurdly loud music sucks. I don’t care what I’m inebriated by or how inebriated I am, it’s obnoxious. Bonus obnoxious-points to the restaurants who blast music. There’s two I can think of in Boston and while the food was great I’ll never go back because I could barely talk to my partner. Like, what’s the purpose of music that loud in that setting?
This is made worse by the modern sparse/industrial designs in a lot of newer restaurants. Exposed blank walls and wide open areas for echoes to proliferate. No carpet. No wall hangings. Concrete everywhere.
I think the purpose is to make you drink more when you're there because you can't talk and then to get you to vamoose and free the table for another diner rather than having a pleasant-to-you but unprofitable-to-them postprandial chat.