Paul McCartney says that Bob Dylan introduced The Beatles to marijuana in 1964. McCartney described the experience as a positive one. It took place while they were on tour and staying at New York's Delmonico Hotel.
In an interview posted on UltimateClassicRock.com, McCartney said, “So we were all together in the hotel suite; we were having a drink, and then Bob arrived. We said ‘hi,’ and he vanished into a back room.”
Ringo followed him and a little while later he returned “looking a little bit dazed and confused.” Paul explained that they had never had it and when they asked Ringo what it felt like he said, “Well, the ceiling feels like it’s coming down a bit.”