Cafés should follow the standard regulation for fire extinguishers. In the public area you have to provide 1 extinguishing unit per 150m² per floor. This also applies to cafés/bars. If you don't serve warm meals, this suffices for your café/bar. Specifically, this means you need at least one foam fire extinguisher. This fire extinguisher protects you against all fires involving solids. If you do prepare warm meals, then you fall under the regulation of restaurants and you have to provide an extra CO2 fire extinguisher of 5kg and a fire blanket. You may be better off with our catering package.
Also remember to attach fire extinguisher pictograms above the fire extinguisher. This is mandatory. Pictograms indicating the (emergency) exits and emergency lighting are also a must. A successful evacuation starts with good indication!