Black Sabbath (Tony Iommi, Ozzy Osbourne, Geezer Butler and Bill Ward) in 19970. Photo by Chris Walter/WireImage. Does it make me, a sober person, a hypocrite to write a 4/20 column? No. It’s not my fault all the best music is either about or made by people on pot.…

Frank Zappa performs in Rotterdam, Netherlands on May 24, 1980. Photo by Rob Verhorst/Redferns. In my capacity as a data journalist, I go to a lot of conferences, and it’s become a tradition in this column that I mark my travels with a column about artists from each city.…