Zombie Apocalypse is Insomniac's post-apocalyptic-themed dance festival, staged at the Queen Mary in Long Beach, the retired ocean liner whose Art Deco decks and reputation for hauntings make it a fittingly eerie stage. Costumed crowds, horror-leaning production, and a bass-and-house lineup turn the ship and its grounds into a survivors' party. It's one of Insomniac's more theatrical SoCal events, leaning all the way into the spectacle, and it gives Long Beach a dance festival with a setting no other venue in the region can match.