Wrap up this decade with a swanky, speakeasy-style night out—very appropriate given the centennial of the roaring '20s—under the Space Needle. Tickets include virtual and augmented reality experiences, live DJs, laser karaoke with Baby Ketten, craft booze, and after-hours access to exhibits. For a dash of scientific geekdom, you can check out a diamond-making demonstration, build glammed-up robots, marvel at a Van de Graaff Generator, and get up close with "exotic animals." by Elaina Friedman