Story was read sometime in the 1990's, but could have been written any time before that. I hope someone knows the title and/or author!
In-home TVs are always on. Loner protagonist gets fed up and goes to (governmental? corporate?) office to ask for it to be turned off because it annoys him. Guy behind the desk basically tells him it's for the greater good; lots of research shows everyone likes it except for a very small minority. Guy also tells him that people in that minority tend to eat a certain sort of cereal, probably haven't had sex in a long time, other predictive behaviors. Loner immediately decides to switch cereal brands when he goes home, has an unsuccessful encounter with a woman he picks up (in the apartment building's laundry room?).
I'm fairly sure Loner had at least two meetings with Official Guy but I can't remember how it ends.