The Patil/Kiva Seminar room is on the 4th floor of the Gates Tower in the Stata Center (Building 32).
Enter Building 32 at the front entrance and proceed straight ahead; there will be elevators to the right. Take the elevators to the 4th floor; exit to the left and then turn right at the end of the elevator bank. At the end of the short corridor bear to the left and continue around the R&D Dining Room. CSAIL Headquarters will be to your left and the Patil/Kiva Seminar Room will be straight ahead.