With the abundance of Halloween parties large and small happening in San Francisco this weekend, but the one that captures the essence of the underground of San Francisco will be Spider Ball, offering a truly unique Halloween experience. Hosted by the Burning Man collective Playa Love and happening at the historic Bentley Reserve across from Embarcedero Center. Two stages and six full bars, with beds for seating and a separate chill room. The festivities begin at 10 pm Halloween night with performances going  until the early morning. Headlining the event are ambient electronic music artist Random Rab, diverse world beats from Oakland group Beats Antique, and bass-heavy dance music from VibeSquaD.

Proceeds from the event will go towards the Black Rock Arts Foundation whose mission is to support and promote community-based interactive art.Tickets are available online with general admission for $55 and VIP tickets (drinks included) for $120. (Imagine Castro Halloween bash meets Burningman Decompression and you get the drift of the party.)