Underworld is a Halloween play party built around atmosphere, connection, and exploration. Come with friends, partners, a polycule, or on your own. Socialize, flirt, negotiate a scene, find someone new to play with, or simply explore the space and see where the night takes you.

Paradox provides the setting: an intimate, upscale kink venue with atmospheric lighting, thoughtfully designed spaces, and high-quality equipment throughout.

The main floor is the heart of the night, with plenty of room to play and a central stage for those who don't mind an audience. Explore crosses, spanking benches, bondage tables, cages, bondage beds, and other equipment throughout the venue.

Head upward to discover the mezzanine and loft, giving you different perspectives and spaces to settle into as the night unfolds. When you want something more private, Paradox's private rooms offer spaces away from the center of the party. And when you want conversation instead of play, the social room gives you somewhere to meet people, reconnect with friends, flirt, and decide what comes next.

We’ll have a costume contest, plus more Halloween surprises, activities, and icebreakers to be announced as we get closer to the party.

Whether you're here to play hard, make connections, show off an incredible costume, explore with someone you already know, or meet someone you don't, there's no single way you're expected to experience the night.

Halloween only comes once a year.

Cross over. Come socialize. Come flirt. Come play. Welcome to Underworld

The Venue

• This event will take place at Paradox - 1310 Mission Street, San Francisco, CA. It is in SoMa and a 10 minute walk from the UN Plaza/Civic Center BART station.
• No alcohol or drugs are permitted on the premises. If you violate this rule, you will be asked to leave and no refunds will be given.

This event features themed music, darker lights, and.plenty of room to flirt, play and more!

The wheelchair-accessible Main Floor is mainly a large, high energy dungeon with smaller and more intimate social areas: couches, good company, and an erotic art collection; some permanent, some for sale. The dungeon includes a stage for those who like to be the center of attention when they play. There is a queen-size loft bed rated to hold up to 2,000-pounds, so plenty of room for multi-person play, with another queen size bed underneath. There are also rope rigs, a BDSM coffin, spanking benches, sex slings, and more.

The Mezzanine overlooks the entire main dungeon, and features seating areas for voyeurs - and even more play space.

The Loft features the glass-walled sex room: two king-size bondage beds with lots of restraint points, a queen platform bed, a twin bed, a padded cage perfect for cucks, and a human-sized dog bed in the corner for all the pups. It's glass-walled for a reason, with some space in the hallway for voyeurs.

Consent is Paramount

Part of our responsibility in fostering a consent culture is to provide some guidance to help prevent consent incidents from happening at our events.

Please make sure you read and understand our event rules and consent guidelines before you come to any Paradox event. By coming to an event you acknowledge that you understand the rules and agree to abide by them. If you have any questions or need clarification on any of our rules or guidelines please contact us before coming to an event.

Any consent concerns can be confidentially given to the hosts at the event or by email at info@paradox-sf.com.

Dress Code

For one night, Paradox becomes a place just beyond the familiar. Dark, strange, seductive, and a little unreal. Come dressed for Halloween, whether that means beautiful, monstrous, supernatural, extravagant, unsettling, barely dressed, or something entirely your own.

Inclusivity & Safety:

• We warmly invite and encourage individuals of all ages, races, ethnicities, gender identities, sexual orientations, and abilities to attend our event. We are committed to creating an inclusive and welcoming environment where everyone can feel safe, respected, and celebrated. Your unique identity and experiences enrich our community, and we look forward to sharing this special experience with you.
• Consent and respectful behavior required. Read the event rules and consent guidelines.
• -If you are having symptoms consistent with COVID-19 or other infectious diseases please stay home and do not come to the space until you are better.

Refund Policy

• No Refunds. All sales are Final.

Accessibility Notes:

• The entrance to the space is on the ground floor and is wheelchair-accessible, including social area, play area, and two accessible all-gender bathrooms. The mezzanine level above the bathrooms and upstairs Loft areas can only be reached via stairs. There will be music playing throughout the night, and ear plugs may be available at the front desk. There are colored lights in use throughout the venue, including moving “party lights” for ambiance. Cell phones may be prohibited from being used at the event venue and must be stored; however, you may speak to a host or DM about reasonable accommodations if needed for things such as continuous glucose monitoring.
• For further questions and accessibility requests, please reach out in advance by email at info@paradox-sf.com.

Connect

As with all AfterDark events, we'll have role stickers at the party to help identify and spark connections. We'll also be using our wristband system to make it easier for people to appropriately initiate social interactions.

Yellow wristband: You're comfortable being respectfully approached about the possibility of play.

Red wristband: You prefer not to be approached about play, although you may be open to conversations about other things. Let someone wearing red bring up play. Don't bring it up to them.

Want to start meeting people before the party? Join the Underworld event on Plura.

Consent is Paramount

Part of our responsibility in fostering a consent culture is providing clear guidance that helps prevent consent incidents before they happen.

Please make sure you read and understand our event rules and consent guidelines before attending any AfterDark event. By attending, you acknowledge that you understand the rules and agree to abide by them. If you have questions or need clarification about any rule or guideline, please contact us before the event. Consent concerns can be confidentially reported to the hosts at the event or by email at info@afterdark-events.com.