I don't know how no one has mentioned the Simpsons or South Park.

I'm sure you could find more examples, but for now, I'll just throw out the Simpsons episode where Homer does medical marijuana, and for South Park when all the hippies come to have a mass meeting in South Park, Cartman throws them a joint in the basement I think.

That Simpsons episode was classic though, Lisa was making references to the house smelling like Otto and the art teacher's jacket, lol.