Taylor's main task as an assistant in the movie is to give Will the director a pack of cigarettes. Will never actually lights a cigarette and smokes it, but he always has it in his hand to appear more "sophisticated".
There is a section where Georgie and Teddy go to the bathroom to smoke marijuana. While the actual act of smoking isn't seen, Georgie does place the weed in his mouth for half a second. For the rest of the film, Georgie and Teddy are seen to appear as if they were under the influence.