M5 is an open learning environment for ECE undergraduate students. It is located on the University of Massachusetts Amherst campus in Marcus Hall, Room 5.
Northeast Hackerspaces::

A hackerspace is a real physical place where people with common interests, usually in science, technology, or digital or electronic art can meet, socialise and collaborate. It can be viewed as an open community lab, workbench, machine shop, workshop and/or studio where people of diverse backgrounds can come together to share resources and knowledge to build/make things.

Here is a list of hackerspaces in the Northeast United States:
Midnight Reserch Labs Boston, MA
Willoughby & Baltic Somerville, MA
Eyebeam New York City, NY
ITP New York City, NY
NYC Resistor New York City, NY
Alpha One Labs New York City, NY
Test Kitchen Manhattan, NY
Stratolab Manhattan, NY
Mid-Atlantic Retro Computing Hobbyists Wall Township, NJ
Fubar Labs New Brunswick, NJ
AS220 Labs Providence, RI
DC401 Providence, RI