To each their own.
I can drink one coffee a day, but much prefer to go without on a big ride day. I also choose energy gels without caffeine. At the end of a ride, one beer is about all I need as well. But I think I'm talking about a different kind of ride than VV was talking about. For a social gathering ride, meet at a park and do coffee, I'd bring a picnic pannier full of whatever I needed. I don't think weight would be an issue for such a ride. Hand grinder (even if it wasn't a perfect grind) would be cool. Things always taste better out in the woods anyway.