The Boston Symphony Orchestra is celebrating the 100th birthday of Symphony Hall this weekend. The Centennial Season includes free concerts for the community, and there is an Open House on Sunday from 8am – 10pm with a wide range of musical performances. Once a friend and I waited in line outside Symphony Hall for “day of concert” cheap tickets. Most everyone in line was a college student, some studying hefty orchestra scores. We got front row seats, which was a little too close, but still a memorable experience.