Nope.
I know some people smoke with their parents and whatnot, and while I would love to smoke someday with my father, I think that would be really strange. Drinking is another matter however. :D
With my brother, we both have/had heroin addictions but I would never get high with him... once again, would just be too weird.
None of my cousins do drugs they're all pretty straight-laced so no I wouldn't offer anyone in my family drugs.