I don’t think any hotel allows pot smoking. Use a vape instead.  

Areas around Boston metro are good for outcalls as Boston hotels have limited parking for visitors  
Try areas that are close to the highway Waltham(I/90-95), Braintree(I-93) Saugus(Rt1), Woburn/Burlington (I-95)areas all provide reasonable rates and are high traffic so a visiting escort would never attract attention.

The usual comment is to avoid naming specific hotels or providing other specifics as it might only lead to a crackdown or worse. IF you are going to reply to the OP, it is recommended that you do so via PM.
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Posting "Hotel No-Tell is great! Biff works the desk from 4 PM - midnite. Slip him $50 and he'll give you a great room, spare keycard, and look the other way when your guests arrive."  is a great way to bring on the heat and get Biff fired.