Mellow Cafe is a 27-square-meter takeaway cafe under construction in Mulhouse, France, organized around a freestanding coffee counter, a tightly programmed retail perimeter, and a street-facing threshold that extends service into a four-square-meter exterior zone. The project uses reflective metal, gridded surfaces, pale-blue markers, and layered lighting to make circulation and service legible within a compact existing shell.
Mellow Cafe Technical Information
- ArchitectsWrong Door Studio
- LocationMulhouse, France
- Gross Area31 m2 | 334 Sq. Ft.
- Project Year2026
- Photographs© Olga Kulichihina
The project treats the compact cafe as a complete spatial sequence, where material, light, and circulation shape the experience of ordering and waiting.
– Kseniya Popova
A Compact Cafe as an Urban Interface
The proposal recasts a previously closed and visually inert shopfront as a working threshold between pavement and interior. A recessed frontage, finished in small light-grey mosaic tiles, creates depth at the street edge while connecting the facade to the interior’s gridded language. The tiled reveal frames a glazed entrance and a large takeaway opening, keeping the coffee counter, refrigeration, and staff activity visible from outside. Rather than treating the facade as a graphic surface, the project makes it an extension of the operational layout.
The four-square-meter exterior area is modest, yet it is assigned several distinct roles. A pale-blue bench provides a place to wait or consume a drink, while small cup trays turn the seating element into a usable support rather than a symbolic gesture of hospitality. Pale-blue crosses, directional lines, and text on the paving identify the entrance and coffee area. These markings begin the circulation sequence before visitors enter, reducing ambiguity at moments when the interior counter may be occupied.
The deep plaster soffit further thickens the boundary between street and shop. Lettering, a menu panel, a street bin, and the takeaway window are gathered within this sheltered zone, concentrating service information where it can be read at walking pace. Compared with the existing opaque frontage and glass-block opening, the new elevation is more permeable and more explicit about the exchange taking place inside. Its public character comes from visibility and use, not from increased scale.
Planning the Customer Route Around a Service Island
The irregular, slightly trapezoidal room is ordered by a long freestanding service island set parallel to the principal wall. This counter separates the barista work zone from the customer route without fully enclosing either. Its position permits service from the long edge while maintaining access to the retail perimeter, rear display table, refrigeration, and secondary staff areas. In a room of this size, the island operates as both equipment infrastructure and spatial datum.
Visitors enter beside the street facade and move around the island through a sequence of ordering, pickup, and browsing. Floor symbols establish queue positions and point toward additional products, while shelf groupings give the perimeter differentiated roles. Snacks, beverages, refrigerated goods, and coffee retail are not dispersed arbitrarily. They are arranged as recognizable zones along the route, allowing customers to browse without crossing directly into the service area.
The plan compresses several practical demands into 27 square meters: espresso preparation, washing, point-of-sale equipment, pickup storage, chilled display, dry retail, staff access, and back-of-house storage. The success of this compression depends on maintaining readable clearances rather than filling every wall with fixtures. The central counter concentrates the most intensive work processes, leaving the edges available for display and circulation. This division also keeps the visual field relatively open despite the program’s density.
Reflective Metal, Grid Systems, and Controlled Material Contrast
The counter is clad in distorted mirror stainless steel, whose vertically rippled surface disrupts straightforward reflection. Instead of functioning as a polished mirror, it stretches and fragments images of the floor, ceiling grid, equipment, and moving bodies. In a narrow interior, this effect expands perceived depth while making the counter’s surface responsive to changing occupation. The material gives the service island a spatial presence rather than a merely ornamental one.
Other finishes modulate the intensity of this reflective core. White decorative plaster provides a matte background for the projected menu and mounted shelving. Brushed stainless steel forms worktops and doors where a less visually active finish is needed. Chrome wire mesh, checker plate, and stainless mosaic tiles introduce industrial textures at different scales, from shelving screens to the angled corner display and the rear retail table. Pale-blue glass and painted details interrupt the metallic field with a controlled color register, distinguishing selected touchpoints without overwhelming the room.
Grid systems recur across the project in several forms. The facade mosaic, open-cell ceiling, wire shelving, stainless display table, and floor graphics all establish a repeated measure. This repetition gives the small fit-out a coherent order, linking street frontage to interior fixtures and overhead infrastructure. The grid is not a decorative motif detached from use: it accommodates lighting, supports products, organizes surfaces, and frames the space’s visual rhythm.
Light, Projection, and Environmental Legibility
A chrome open-cell ceiling spans the room as an exposed infrastructural field. Its dark void allows lighting panels, spotlights, suspended speakers, and a projector to be inserted without requiring a separate suspended ceiling system for each function. Flat luminous panels provide general illumination, while equipment remains visible and adjustable within the grid. The ceiling therefore combines environmental servicing with the project’s broader material vocabulary.
Light is distributed through several overlapping conditions. Diffuse panels soften the room’s overall illumination, while LED-edged glass shelves give retail goods a precise visual presence. Backlit signs identify product areas and refrigeration units, and daylight enters through the street-facing glazing and takeaway opening. This layered approach avoids relying on a single ambient source, which would flatten the metallic and textured surfaces. It also gives the small interior different visual depths from the street, counter, and retail edges.
The projected menu is particularly significant because it turns an otherwise plain plaster wall into an adaptable information surface. It avoids the accumulation of fixed boards, printed graphics, and menu frames that can make a compact cafe visually congested. Together with pavement markings and interior floor symbols, the projection treats communication as part of the spatial system. Ordering, pickup, browsing, and entry are indicated through light, surface, and position, allowing operational information to remain embedded in the architecture.
About Wrong Door Studio
Wrong Door Studio is the architecture firm behind Mellow Cafe in Mulhouse, France, led by principal architect Kseniya Popova. For Mellow Cafe, the studio developed a compact takeaway cafe through careful planning, reflective materials, grid systems, layered lighting, and clear circulation.
Credits and Additional Notes
- Client: Confidential
- Lighting: Kseniya Popova
- Collaborators: Alina Sivak and Olga Kulichihina
- Visualization and photography: Olga Kulichihina.
