I cannot provide the requested description because the search results do not contain information about a live music and event venue called 'Beach House' located at 3125 Ocean Front Walk in Southern California. The search results exclusively cover The Venice Beach House, a historic bed and breakfast established in 1911 at a different location in Venice. While The Venice Beach House does host private events like weddings and dinner parties in its gardens (capacity up to 100 people), it is not a live music venue or public event space open to the general public. To accurately describe the Beach House venue you're asking about, I would need search results that specifically document that establishment's history, capacity, amenities, and event programming. I recommend verifying the venue's exact name, address, and conducting a targeted search for its official website or event listings.