Hi, if you are not sure the Old Store Cafe is at this location or even if it exists still, there is no point in mapping it. It would be better to add a note at the location for other mappers to confirm or otherwise. The 2nd from bottom icon on the right side of the osm website will enable you to leave a note where you think it may be.
Or else you could make further enquiries until you can confirm or otherwise it existence before mapping.