Cosmos Club

Picture a storied mansion where Beaux-Arts architecture and historic refinement shape every detail. Grand staircases, ornate ceilings, and richly appointed interiors create an atmosphere of quiet luxury, while art and collected artifacts lend depth and character throughout the club’s interconnected spaces. Each room feels intimate yet distinguished, designed for gatherings that unfold with effortless sophistication.

The Mansion, Annex, and Hillyer House each introduce their own sense of warmth and elegance, from stately ballrooms to intimate parlors suited for quieter moments. Soft lighting, historic textures, and layered architectural details create a seamless flow from ceremony to reception, allowing the celebration to feel immersive and deeply personal within the heart of the city.

With its blend of intellectual heritage and timeless design, the Cosmos Club offers a setting where celebrations feel refined, memorable, and steeped in enduring elegance.

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Highlights

Bridal & Groom Suite Rooms

Bridal suite and groom’s quarters available for wedding day preparation

Photo Sessions

Historic gardens, elegant interiors, and Gilded Age architectural details for timeless portraits

Event Rentals

  • Tables, chairs, and basic linens included
  • Flexible decor customization allowed

Lighting & Sound

Sound systems, projectors, and event lighting available

Catering

In house catering with customizable fine dining menus

Bar Services

Full bar service with professional bartenders

Event Coordination Team

On site event coordination and planning support

Parking

Street parking nearby with valet options available

  • 120 seated guest capacity for the ceremony 
  • 120 seated guest capacity for reception 

Make it yours

  • Personalize the Main Ballroom with floral installations, custom lighting, and lounge style layouts that complement the club’s historic character
  • Exchange vows in the Library surrounded by rare books and scientific artifacts, creating a setting that feels intimate, intellectual, and timeless
  • Shape the dining experience with themed menus influenced by science, literature, or art, bringing a thoughtful and personal layer to the celebration
  • Incorporate live string quartets in the drawing rooms or interactive experiences that reflect the spirit of discovery woven throughout the club’s atmosphere

Location

Located along Embassy Row in Washington, D.C., the Cosmos Club is surrounded by historic mansions and tree-lined avenues, offering an elegant urban setting rich in heritage and prestige.

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2121 Massachusetts Ave NW, Washington, DC 20008

Interested in getting married at Cosmos Club?