I have known many who drink beer, wine, even a vodka martini (shaken, not stirred) because the like the taste, and like the way it complements a meal... I have never known any who smoke weed for any other reason than to get the special effects.
As I said in the thread about mandatory testing, I was just out drinking with some America West pilots, and they told me about this rastafarian pilot for a Jamacia based airline, who....