Don't look like you were partying the night before. Avoid showing up anywhere wearing wristbands from the club from the night before, stamps or X's on your hands from the bars you went to; or just smelling like sweat, bars, beer, or even vomit. Get your day-old eyeliner off your face, take a shower, and don't show up anywhere, not even brunch, without looking like you're ready to start a new day; not crawl back into your lair. Even if you did have a rough night, don't say: "
I am so hungover." That is not classy.