Listening (on repeat) to the Kronos Quartet performance of John's Book of Alleged Dances got me thinking if other quartets are performing this work. I didn't find much on Google although this link describes the Music at Mayer series in San Francisco. In January, Kronos will play the work along with pieces by Meredith Monk and others.
Also of note, in April: Remembering Lorraine:
This concert will feature interviews and images of the artist, reminiscences and performances by fellow musicians who knew and admired her.