Every September, tens of thousands of people gather at the Boston Common for the Boston Freedom Rally. The event campaigns for legalization and normalization of cannabis in the USA.
The first Boston Freedom Rally took place in 1989 in North Adams, Massachusetts. The next year an event was organized at a dock beside the USS Constitution. Boston Freedom Rally has moved locations a few times over the years but now resides at the Boston Common.
There are various legalization initatives underway in Massachusetts, the most supported is BSR 15-23, which is supported by The Massachusetts Cannabis Reform Coalition (MASSCANN) and NORML, organizers of the Boston Freedom Rally.
https://www.youtube.com/watch?v=LbJwQJCBT-E