Dumpster diving Cambridge

No judgemental comments please and I'm not looking to start on a big debate on the merits/ethics of dumpster diving. If it's not your thing, fair enough, please just move along to another thread. But was wondering if anyone dumpster dives or knows anyone who dumpster dives in Cambridge? I only moved to Cambridge recently and I would love to have a buddy/group as it's a lot safer than going solo. I dive due to money being tight as well as political/ethical/environmental reasons.