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Advertising off campus is prohibited for student groups. Waivers can be obtained, however. More information here:
http://web.mit.edu/eventguide/advertising/index.html
Spam is your friend. people will probably reply to you complaining, but not that many. you'll also get some bouncing emails and "away from office" emails. but it's totally worth it.
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Lists to spam less often:
<ensemble-alum-ma@mit.edu> - ensemble alums in the boston area
<ensemble-alum@mit.edu> - ensemble alums all over (it's good to remind officers to update both of these, as they often forget)
Dorm Lists:
<ensemble-dorm-spam@mit.edu>
<ec-discuss@mit.edu>
<senior-house@mit.edu>
<random-hall-talk@mit.edu>
<bexley-minus-fascists@mit.edu>
<baker-forum@mit.edu>
<bc-talk@mit.edu>
<mccormick-announce@mit.edu>
<macgregor@mit.edu>
<newhouse@mit.edu>
<next-forum@mit.edu>
<sponge-talk@mit.edu>
<fenwayhouse@mit.edu>
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