John L.
Yelp
The Democracy Center is both a great resource and a great place to hold various meetings. In terms of resource, there are offices of different groups within the Center itself (as I learned on Wednesday night, ActBlue got its start here, among others). Furthermore, there's the Papercut Zine Library, a resource I haven't had the chance to check out yet, but looks very cool.
The meeting-space level is where the Center really shines. The spaces are available with approval for relatively cheap cost, and one can hold events and meetings for groups that range from a few people (the Rosa Parks and Cesar Chavez rooms seem to fit this bill) to larger book events (the Nelson Mandela room can comfortably fit at least 25, as I found out with our book event). The spaces are very well-kept, and easy to work with, especially considering that the Center has tables and chairs at the ready for moving in and out of the room based on how many people one has. Furthermore, the staff is incredibly friendly and helpful.
It is incredible that there's such a great resource in Boston for meetings and groups. If you're a group leader, a group member, or just someone who wants to check out cool stuff, The Democracy Center is a great resource. They have a wide variety of different groups meeting, some open to the public, and have space available for people to work with that's relatively cheap. :)