question about short term subleasing - 波士頓

I am going to attend a conference in Boston during Dec 27-30.
Since I have never been there before,
i was wondering if anyone can tell me anything about the housing situation there.
I plan to stay for 5-7days.
so if anyone can tell me about any cheap and safe hotel/hostel, i'd really appreciate it.
thank you in advance

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Peace & Love
http://tw.myblog.yahoo.com/numerein36

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