If you want one furniture collection that can move between a café patio and a residential balcony, I’d focus on commercial-grade pieces with a residential look. A powder-coated aluminum bistro set is the easiest starting point: it’s light, rust-resistant, and usually stackable, so staff can clear the café patio quickly and residents can store chairs on a small balcony. Choose a round 60–70 cm table or a slim folding table if space is tight, and look for HPL or compact laminate tops that handle rain, coffee spills, and daily wipe-downs.
For seating, stackable chairs with UV-resistant slings or cushions are practical. If the café wants a softer lounge feel, a small modular outdoor sofa in weather-resistant fabric can work on both sides—just keep the modules narrow and add a storage ottoman for cushions. Teak or acacia folding chairs are warmer than metal and still suit residential balconies, but check that the finish is suitable for commercial use.
Don’t overlook scale and storage. Balconies need a compact footprint and easy folding; café patios need pieces that can be packed away at closing time. A nesting side table, a bench with hidden storage, and a simple outdoor rug can tie the look together without making the balcony feel crowded. Stick to two or three materials—aluminum, teak, and a performance fabric—so the furniture feels intentional in both settings. Finally, buy pieces labeled for outdoor commercial use when possible; they’ll hold up better to repeated cleaning, sun, and rain while still looking residential.