Thousands of developers, executives and tech nerds descended on San Francisco for Google's massive I/O conference. The I/O After Hours party combined the best parts of music and food festivals with tons of quirky interactive games and surprise moments.

While bands The Family Crest, Con Brio and Best Coast performed live sets onstage, guests got a chance to participate in group outdoor karaoke, collaborative art projects (a dart wall made of 1000 paint balloons), "accidental zen" pods, a meta photo safari, silent disco and an unforgettable Jedi Knight flash mob that got everybody in on the action.

From catering to performances to overall guest experience, Google I/O After Hours was an unprecedented success on a grand scale.