And don't even start in on the "for tobacco use only" hookah's.
Hookah's are tobacco only, really. That's not sarcastic either. I have never heard of anyone using a hookah to smoke pot. Not saying it's never happened, but the fact is that they just wouldn't be optimal for that use, but some flavored tobacco, mmmmm. Now, shops like 420 that sell "water pipes" and "glass pipes" is a different story.