Green Library's Seminar Room (Room 301) is located on the third floor of the Bing Wing.

To get there you can take the elevator that's on the right just after you enter the Bing Wing (the same elevator that goes to the Bender Room on the fifth floor); Room 301 is the first room on the left once you reach the third floor. If you're feeling especially energetic and want to take the stairs, you can turn left upon entering the Bing Wing and then take stairwell 14 up to the third floor. When you arrive, turn right and you'll see Room 301.