There are some who have reached the age at which they can drive themselves and another person to a restaurant but who have yet to master the concept of an "inside voice."
Note: while I am studying, I do not care to hear you describe what you are eating to your friend on the phone. If I were sitting next to you, or even a few feet from you, I realize that hearing your voice would be unavoidable. Sure. But if you are across the room, and there are several other people and groups of people sitting, talking, closer to me than you are, and I can hear vague mumbles from them, but distinct words and sentences and freaking paragraphs from you, you are not using your inside voice. And when you're describing all the movies you've seen in the past year to your "date"? Not only does hearing your voice annoy me, but so does your cinematic taste.
(I'm sorry to be such a complainer of late. I'm not getting enough sleep and am amazingly busy. However, you do have to admit that you kind of sign on for this sort of thing, when you read a blog that has "rants and ravings" in its title.)