Keep your friends close and your enemies closer. That's right. It's the Bikini's 70th birthday - and thus, National Bikini Day. Not only does this mean that your itty-bitty, teeny-weeny, yellow polka dot bikini is older than your Grandmother's chicken noodle soup recipe, but also that you have all the excuses to extend your holiday weekend one more day. I hope you're not too red, white, and bloated because we've gathered a guide of the best places to boast your favorite bikini in NYC. Sun's out buns out, ladies.