May 29 2005 - Jay Leno took over hosting The Tonight Show in 1992, and he has made pot-friendly jokes a regular part of his monologue, continuing Carson's tradition by implying that bandleader Kevin Eubanks is a toker.
Although we have no evidence that Leno himself partakes of the herb, he has made a point of promoting pot culture on his show. Pot icon Tommy Chong also made his first post-prison appearance on The Tonight Show, with Leno complaining about the injustice of the anti-bong laws.