A popular restaraunt here in Yerushalayim has a small idol on its cash register. Every paying customer will see it. The staff will answer your questions about it, and recommend reading. Its' ...
Is the Buddha statue (or Hindu statues) a problem at Kosher Indian restaurants? (This is different than the cat question since the cat is only a good-luck superstition and these are actual idols)
It seems like all kosher Chinese restaurants have this cat-statue thingy in the front: Is there any Halachic problem with that? I assume not, if they're all kosher-certified; but why not?