Case Study: Inside Washington DC’s ‘Space Prom’

March 25, 2026

Designing the Goddard Memorial Dinner

The Dr. Robert H. Goddard Memorial Dinner—known informally among insiders in Washington, D.C., as “Space Prom”—is as much a feat of design and logistics as it is a celebration.

Held at Washington Hilton, the annual event gathers more than 2,000 leaders across government, aerospace and academia to honor innovation at the highest level. But for Encore Decor, the premier D.C. event design firm that has designed the signature event’s celestial inspired decor for the past four years, the challenge isn’t just scale—it’s multiplicity. Working with the National Space Club and the GA Team, Encore Decor was well versed in what to expect.

“This isn’t just one large event,” says Sara Rose Harmon, president and creative director of Encore Decor, “It’s multiple experiences happening at once.”

Owning the Hallway

Before the guests convened in the hotel’s iconic football shaped ballroom for a lavish dinner and awards program, they mingle over cocktails in reception spaces hosted by major aerospace companies. With eight receptions in smaller meeting rooms along the Hilton’s winding concourse level and three more on the upper level for the event’s signature Red Carpet reception, each space functions as an immersive brand environment—open before and after the awards ceremony, and constantly in motion.

“It becomes a kind of live showcase,” Harmon notes. “Guests flow from room to room, and there’s a natural curiosity. Guests are interested in who did something unexpected, who created the most unique brand experience.”

Rather than over-furnishing with lounge seating, Harmon has learned to design for flow first. High-impact vertical branding ensures logo visibility even when rooms get crowded, while perimeter decor, lighting and sculptural food displays create impact while preserving coveted standing space.

“People think comfort means more chairs to sit,” she adds. “But at this scale, comfort is movement.”

“Guests need moments to reset, have a conversation and actually connect,” Harmon says. “That balance between spectacle and space is where the event succeeds.

Designing at Scale

Goddard dinner

With over a dozen subcontracted vendors to manage, a tight install schedule and multiple environments opening simultaneously, execution required precision. A rare early access window granted the day before allowed Harmon to bring in teams for installation in the ballroom and suites in tandem, layering decor piece by piece until each space came together.

Even then, adaptability was key. When an LED wall installation fell short of venue constraints, Harmon’s team made changes in real time by redressing and refining onsite without compromising the overall design.

“In the live events industry, on-site surprises and challenges are inevitable,” Harmon says. “The trick is how quickly you adapt and find a solution for your client and their guests.”

A Ballroom That Grounds the Experience

While the hospitality suites invited exploration, the ballroom anchored the evening.

This year’s design marked a notable shift. Encore Decor upgraded the organization’s traditional fiber optic backdrop to a dazzling black sequin drape. A custom six-foot National Space Club medallion became a focal point, designed with both visibility and photography in mind.

Four illuminated cherry blossom trees extended the vertical plane of the stage, subtly referencing both the season and the 100-year legacy of Dr. Goddard. Silver sheer drapery softened the stage’s existing gold drape, adding a visual frame.

At the table level, the look remained restrained but layered: six different floral designs graced the table with three linen patterns used throughout the ballroom. Florals were concentrated in white hydrangea, Phalaenopsis orchids and cala lilies with pops of red roses. The intention behind the design colors and soaring shapes was a suggestion of the celestial.

For Encore Decor, the Goddard Dinner reinforced a core philosophy: the most engaging events are deeply layered.

“When you give people multiple environments,” Harmon says, “They’re not just attending. They’re discovering.”

And in a room full of people shaping the future of space, that sense of discovery feels exactly right.