From Andrew Sullivan A boomer writes:

"I laugh inside whenever I hear somebody talk about smoking pot as something you "grow out of." Most of my friends still indulge and we are almost all over fifty. We have responsible careers, have raised families, and besides the rare DUI, no criminal records. When pressed by a non bus rider, I'll admit to having experimented with drugs....what I don't say is that the experiment is still in progress. Stop the insanity, legalize marijuana."

http://andrewsullivan.theatlantic.com/the_daily_dish/2008/06/experimenting-s.html

And this from the Scientific American:

This Is Your Mom on Drugs: Aging Doesn't Stop Drug Use

http://www.sciam.com/article.cfm?id=when-im-sixty-four&sc=WR_20080520