Note added today: For National Bike to Work Day, Blue Bikes had a promotion offering a free day's membership for their system. (Blue Bikes is the new name for Hubway now that Blue Cross Blue Shield of Massachusetts has taken over sponsorship of the docked bikeshare system.)
This membership was a standard daily membership, which meant that for the day you could check out any of their bikes for a two hour rental for free, as many times as you liked during that day. I checked out two bikes, all starting at Alewife and rode for about three and a half hours total.
