Diamond Ball.Room - O2 World Berlin

Lead DesignerPeter Joehnk & Corinna Kretschmar-Joehnk
Project LinkView
Prize(s)3rd Place in Interior Design / Renovation
Entry Description

With subtle allusions to the clandestine allure of an exclusive members’ club in the “roaring twenties”, JOI-Design’s concept for the Diamond Ball.Room, a glamorous new VIP lounge at the O2 World Berlin, evokes the dazzle promised by its name. Four compact private stadium boxes were merged to create a tony entertainment hub for as many as 72 guests to experience live events.
Warm hues of gold, platinum, cognac and ebony create a handsome, clubby feel. When overhead illumination levels are lowered at night, high-contrast lighting accents amplify the drama and excitement, turning the space into an ideal spot for an after-show party.
The Diamond Ball.Room can be used as one generously proportioned single space or for smaller events it can be divided into two distinct places with their own entrances. The halves – dubbed “Vodka” and “Champagne” – feature different design elements which form individual identities for each area yet also harmonise for when they are joined together. Angular design features are present throughout in homage to the faceted diamond. In the Vodka side, shimmering silver highlights and clean, angular lines suggests the cuboid shape of ice cubes as they “clink” in a cocktail glass, while in the Champagne side, iridescent golden accents, glittering lights and soft curved forms recall the tingling effervescence of sipping bubbly.
The Vodka section is characterised by its strong geometric forms. Suspended over the dark timber counter are modern pendant lights whose bent metallic wire frames transform them into glowing asymmetrical sculptures.
The Champagne space presents a different take on smart luxury. Over the bar counter, a cluster of pendant lights made from cut crystal flasks cast shimmering glints of light.
JOI-Design has shaped a sophisticated atmosphere from which VIPs may enjoy a relaxed visit to the O2 World Berlin.


“Functionality is the cornerstone of our work and the fruit of extensive experience. We create spaces that surprise and delight guests with an atmosphere that is both unmistakable and exceptional. Sophisticated tailor-made design solutions infused with the spirit of hotel couture are the hallmarks of our design practice.”
Creating refined and luxurious Hospitality Design has been our labour of love since 1984. Working with highly accomplished and creative interior designers, architects, designers, engineers and artists, the skilled team of this leading European design studio contributes to the development of outstanding hotel projects, sensational restaurants, and exceptional wellness facilities.
Based in Hamburg, JOI-Design brings boundless enthusiasm, devotion to detail, and decades of experience to its endeavours in the field of interior design for both privately owned and operated high-end boutique hotels and projects for luxury-brand hotel chains.
Working with leading product designers, our internationally experienced team has made successful forays into the fields of furniture, lighting, carpeting and bathroom fitting design – all products by JOI-Design.
JOI-Design transforms emotions into tailor-made design that symbolises exclusivity, luxury and high quality. Thus, JOI-Design creates unique havens of well-being, creating incomparable destinations that guests seek out, love and return to again and again.

Our clients include: Le Méridien, Hilton, Kempinski, JW Marriott, Frasers, Hyatt, Dolce Hotels, Mövenpick, Pullman, Radisson BLU, Park Inn, Steigenberger, Ritz Carlton, Sheraton, Hapimag

Number of employees: 40 team members
including: Interior Designers, Architects, Architectural Draftsmen, Perspective Artists, Product Designers.

Books published:

2009 “Raum. Werte. Creating Hospitality Design”. / ISBN 978-3-03768-039-1
2010 “101 Hotel Rooms” / ISBN 978-3-03768-071-1
2013 “Farben der Hotels / Colours for Hotels” / ISBN 978-3-7667-2025-2
2014 “101 Hotel Lobbies, Bars & Restaurants”/ ISBN 978-3-03768-138-1
2015 “101 Hotel Baths and Spas” / ISBN 978-3-03768-180-0
2016 “101 Hotel Rooms” Vol.2 / ISBN 978-3-03768-198-5