creates
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completed

september 2025

responsibility

interior design

programme

402 sqm eventspace

location

london, uk

Hidden beneath the streets of Marylebone, Central London, 77 is a high-energy event space within The BoTree hotel, designed as a seamless transition from refined hospitality to immersive nightlife and a vibrant subterranean venue.
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split-level layout & adaptability

The project transforms a raw, double-height volume into a dynamic spatial experience where architecture, light, and sound operate as one. A split-level layout features an upper mezzanine with VIP tables spread across both floors, each with direct views of the floor and full-service hospitality.

The design process began with the idea of an empty, double-height space. Rather than adopting a conventional theatrestyle balcony, the space is shaped by an intentionally asymmetrical configuration. This unusual setup generates constantly shifting sightlines and alternative perspectives, allowing guests to experience the club from multiple visual angles across both levels.

77 is designed for adaptability. Flexible layouts and transformable furniture allow the venue to shift effortlessly between intimate lounge settings and high-energy nightclub configurations, accommodating a wide range of events and experiences.

03 77 London by concrete Jimi Herrtage
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02 77 London by concrete Jimi Herrtage
01 77 London by concrete Jimi Herrtage
02 77 London by concrete Jimi Herrtage
01 77 London by concrete Jimi Herrtage
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A continuous grid of gold and silver LED lines follows the curved, asymmetrical geometry of the interior. These luminous elements connect and interweave the upper and lower levels, visually stitching the space together into a cohesive whole.

The lighting system is not decorative but architectural; its pulsing effects actively shape the atmosphere and form the backbone of an evolving light show synchronized with sound. A dark base palette establishes a dramatic backdrop, while gold and silver accents reflect and amplify light throughout the space.

04 77 London by concrete Jimi Herrtage
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''77 is a space where the vibrant energy of Marylebone, Mayfair and Soho Converge. Where music, people and culture stand together on equal footing for connection. Where bold visions come to life, and music is felt, not just heard.''

concrete

centre stage

At the heart of the space, the dancefloor is organized around a centrally positioned DJ booth elevated on a raised platform. A monumental video screen cascades from the ceiling behind the DJ, spanning the full height of the wall and delivering dynamic visual content that responds to the music. Complementary screens positioned opposite extend the visual field, fully immersing the audience within a layered audiovisual environment.

Opposite the DJ booth, the bar is clad in folded ribbed metal, introducing texture and depth. An illuminated back-bar display, framed by oversized mirrored panels, becomes both a functional and visual focal point.

06 77 London by concrete Jimi Herrtage
05 77 London by concrete Jimi Herrtage
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facts & figures

total area 402 sqm

concrete

responsibility interior design
team rob wagemans, melanie knüwer, hilka ackermann, max mehl, susanne schanz, romy warnars, eva stekelenburg

partners & collaborators

client shiva hotels, uk
general contractor ellmers, uk
executive interior designer orbit architects, uk
architectural design epr architects, uk

press