While I have no knowledge of Druidry, I did notice that Britain just recognized it as an established religion recently.
Britain recognizes Druidry as religion for first time, gives it charitable status – CNN Belief Blog - CNN.com Blogs
The only thing I know about it previous to reading the above was the religion's connection to Stonehenge. I would have guessed Druidry would have disappeared by now, but obviously not.
There's also Rastafari, which is known for its use of weed in its ceremonies.