In JOSM:
not sure what you mean by this "In the tag popup there are not only the nine tags for the point, but five things listed above the tags, "Facilities...", "Man Made...", "Annotation..." etc."
But here is how I would do using JOSM:
draw the outline of the cafe using the node drawing tool,
click off (select the select tool and click on the background ie not on an object),
select your node with all the tags on using the select tool,
select Edit, Copy from the top menu,
select the new building outline you drew and select Edit, Paste Tags from the top menu,
menu,
check tags seem suitable,
select your old node and delete.
delete.
Probably best to read the Help in JOSM to get familiar with this editor first.
I found the most important think I needed to know was to "click off" after doing each object draw.
![tools][1]
It is also very helpful to tick Layers and Tags/Memberships under the Windows menu and place these at the right side where you can see them. You can add tags there or from the Presets menu. You add the Bing imagery from the Imagery menu and you will see all the layers you have loaded in the box at the right.
![layers][2]
[1]: http://help.openstreetmap.org/upfiles/select.png
[2]: http://help.openstreetmap.org/upfiles/layers.png
