I know I am not even close. I am also at 7, for "Blithe Spirit." My second best was a tie at 5 for "Gypsy!" with LuPone (if counting City Center) and "Brooklyn the Musical."
2010
Feb. 28 - Looped, Feb. 28 - Next to Normal, March 4 - Hair, March 11 - A Little Night Music, March 24 - Time Stands Still, April 6 - La Cage Aux Folles, April 10 - Anyone Can Whistle (City Center), April 10 - Looped, May 9 - Enron, May 15 - A Little Night Music, May 15 - A Behanding In Spokane, May 30 - A Behanding In Spokane, May 30 - A Little Night Music, June 20 - A Little Night Music, June 23 - Red, June 23 - Sondheim on Sondheim, July 13 - A Little Night Music, July 18 - The Grand Manner (Lincoln Center)