Hey Partner,
About Ethan
Ethan Castiglione, Founder & Partner of PartnerSF, combines vision with sweat equity. A Golden Bear Scholar and College Corps Fellow, he graduated with distinction from UC Berkeley after researching how generative AI might compress—or enrich—human thought and language. He’s served constituents in Speaker Nancy Pelosi’s district office, represented 30,000+ students on Berkeley’s LGBTQ+ Chancellor’s Advisory Board, and still volunteers locally—restoring coastal habitat and serving meals to his San Francisco community. A lifelong trail runner, CrossFit athlete, and certified yoga instructor, Ethan lives at the nexus of embodiment, equity, and civic imagination.
What We Do
As a Public Benefit Corporation from day one, we’re dedicated to uplifting our city’s staple community venues—places that become part of your story and you part of theirs—by transforming their off-hours into immersive wellness and cultural experiences that drive new revenue for the business and foster genuine connection.
We handle every detail—from creative programming to marketing, ticketing, and on-site operations—so our hosts can relax and our guests can fully engage. Our signature gatherings include yoga in century-old reading rooms, sunrise runs launching from neighborhood bakeries, and fireside conversations with community leaders in historic galleries.
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We exist because true connection—body, mind, and community—is too precious to lose to screens and closed doors. After a pandemic that shuttered our favorite gathering spots, a steep fall in federal arts funding, and rising costs and political headwinds that leave beloved local businesses feeling fragile, San Francisco’s heart was in jeopardy. PartnerSF was born to reawaken that pulse—breathing new life into non-operating hours, elevating venue revenues, and, above all, deepening community bonds. We believe that gathering face-to-face in the places that shape our stories is the catalyst for resilience, belonging, and lasting impact. That’s why every gathering and every partnership is about more than wellness—it’s about strengthening San Francisco’s social fabric, one open door at a time.
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Face-to-Face
We ignite authentic, in-person connections with events designed to move beyond screens and small talk.Fresh Experiences
We surprise and delight by bringing wellness and conversation to unexpected corners of the city.Give & Grow
Every Partner event channels revenue back into the cafés, bookstores, museums, and other community venues that anchor our neighborhoods. These aren’t one-off transactions—they’re genuine partnerships designed to uplift everyone involved.