Sublet.com Listing ID 1493383. The Marion Inn is located at 105 Marion Street in Brookline, MA.Take the Green C line from Government Center or Downtown crossing to the Summit T stop, the t stop after Coolidge Corner going outbound. When exiting the T, you will see to your left a 7-11 store on the corner of Marion St and Beacon St. we are 2 doors bend the 7-11, a large white house.