I have not smoked much weed out of hookahs, but it seems to me that it is not the most effective delivery device. I would think that the heat from the cool would pretty much burn out all of the THC within the first few hits. If you're the lucky one who gets to take the first hit, you'll probably get pretty high.

I think it'd be okay if you mixed a little bit of weed with the tobacco towards the bottom of the bowl.