Porter Exchange (Lesley University, University Hall)
Restroom is located on the first floor at the end of the small corridor between the little noodle and sushi restaurants.
Location
1815 Massachusetts Ave
Cambridge
Handicap accessible?:
Yes
Baby-changing table:
Yes 
Location
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Comments
Porter Exchange Rest Room
These are located kind of out of the way on the basement level. You are required to obtain a key from one of the stores in the building to gain access to them. They are in decent shape and usually well stocked.
Not So
There may indeed be restrooms in the basement level, but this page describes the restrooms on the first floor.