On Friday August 9, at 8pm, two celebrated Oakland jazz experimenters lead groups of their LA peers at Sun Space (9683 Sunland Blvd, Sunland CA, 91040). First, bassist Lisa Mezzacappa directs the debut of the SoCal Bass Choir, an ensemble of all upright basses playing structured improvisations. Participants are scheduled to include Tony Green, John M. Kennedy, Rebecca Lawrence, Jeff Schwartz, Anthony Shadduck, Andres Swanson, Dave Tranchina, and Scott Worthington, a team of LA’s most open-minded and accomplished classical, jazz, country, and rock bassists. Second, guitarist John Finkbeiner presents a set of twisted tunes with Bay-to-LA transplants Charles Sharp (reeds) and Garth Powell (drums). Finkbeiner and Mezzacappa have recently performed together at the Monterey and Angel City Jazz Festivals, and at The Stone.