For a social event, like this Espionage themed party I went to, I usually opt for bolder make up (the classic YSL red lips), and bling. Accessorize, accessorize.
For an intimate birthday outing of a close friend's, I choose something for comfortable, this short flowy dress. I chose the dress in white for that cool easy going look. Something darker in this cut, would make the dress look dull. Kept my make up fresh with tinted moisturizer (no foundation), smudged eyes (plum shade), subtle blush and my current obsession (creamy pink lips). Always, loads of mascara.