According to ECM Records, Keith Jarrett, Gary Peacock, and Jack DeJohnette will play in Chicago and Los Angeles in October 2011:

• October 21, 2011 (8 PM): Symphony Hall, Chicago, IL, USA
  Tickets: cso.org (on sale ?)
• October 26, 2011 (8 PM): UCLA Royce Hall, Los Angeles, CA, USA
  Tickets: uclalive.org (on sale July 22)

I don’t know when tickets for the Chicago concert will go on sale to the general public.

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