This may sound too simple, but why bother trying to get the store associates involved? Place a large poster on the wall by the entry/exit. Almost everyone sees it, and they
DON'T NEED TO WASTE ANYBODY'S VALUABLE TIME TRYING TO PUSH TO PRODUCT.
It's not like GZ is competing with a similar service being advertised or carried by CC.
So the question is...would CC have a problem with that?