[OSM-newbies] Both amenity=social_centre and shop=books don't render on OSM

[Sebastian Arcus]

I have added a bookshop and a social_centre on the map here, next to 
Uncle Sam's Bistro and Restaurant:

http://www.openstreetmap.org/?lat=53.402597&lon=-2.97722&zoom=18&layers=M

However, neither of them show up on the actual map on OSM. It's strange, 
as shop=books even has a dedicated icon in the Potlatch2 - which would 
seem to suggest it is a "proper" tag. Anybody knows why it doesn't show 
on the map?

As to amenity=social_centre - is it the sort of thing that has to go 
through some process until it gets approved and starts showing up on 
rendered maps? Can I use another tag instead which will show (or 
combination of tags?) Even if it shows as a name, without an icon, it 
would still be useful to those looking for it.