587 Post Street · Downtown San Francisco
A lively, locally-owned bar near Union Square — perfect for birthdays, mixers, and private celebrations for up to 75 guests.
Opened in 2022 · Asian-inspired cocktails · Late night bites · Full buyout available
The Spaces
Reserve the semi-private back area for intimate gatherings, or take over the full venue for an exclusive private event.
Main Space
Flexible seating designed for small to mid-size gatherings. Comfortably accommodates seated dinners or more casual group layouts depending on your event style.
Semi-Private
A more intimate space that accommodates up to 20 guests seated or 30 standing. Ideal for smaller gatherings or private groups who want a dedicated area while still enjoying the energy of the venue.
Full Buyout
Make Lost Cat entirely yours. Exclusive access for up to 60 seated or 75 standing guests. The space can be tailored to fit your event style, from a seated dinner to a lively cocktail party.
Event Types
Birthday parties and milestones with cocktails, music, and a lively atmosphere your guests will love.
Events that feel social, engaging, and easy to host in a relaxed downtown setting near Union Square.
Engagement parties and rehearsal dinners with a fun, intimate vibe and flexible setup options.
Group dinners and team events that bring people together over great food, drinks, and conversation.
Gallery
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Reviews
★★★★★Wonderful Birthday Experience
It was my first time here and I had a wonderful experience. The staff are phenomenal — thank you for this wonderful birthday experience.
★★★★★Charming and Delightful
Overall, Lost Cat is a charming and delightful establishment. As soon as you step inside, you are greeted by a charming cat-themed ambiance.
★★★★★Dark, Intimate, and Cool
This bar rules. It's dark, intimate, and cool. Seriously snazzy little spot that doesn't go for the whole "classy speakeasy" vibe that so many places lean into.
Booking
Submit your date, guest count, and vision using the inquiry form below.
We recommend spaces, menus, and pricing tailored to your specific event.
Our team handles the details so you can focus on your guests.
FAQ
We recommend booking at least 21 days in advance to secure your preferred date. Popular dates fill quickly, so earlier is always better.
Yes. Full venue buyouts are available for private events with space for up to 75 standing guests or 60 seated guests.
Yes. Guests may order food from our kitchen or bring their own catering if preferred.
A 20% non-refundable deposit is required to secure your event date.
We host birthdays, networking mixers, engagement parties, rehearsal dinners, team gatherings, and private celebrations of all kinds.
587 Post Street, San Francisco, CA 94102 — near Union Square, easily accessible by BART, Muni, and rideshare.
Get in Touch
Tell us a bit about your event and we’ll help you bring it together. Our team will respond quickly with availability and next steps.
Prefer to talk? Call or text us at (510) 681-2208 — or stop by at 587 Post Street, San Francisco.