Bass solo at Worldfest.

Ben Harper covering a Peter Tosh song, 'You Can't Blame the Youth.' Rock Deadrick on drums, Leon Mobley on percussion, Mark London Sims on bass.

Joe Caploe and Leonice Shinneman play a Mark London Sims composition, 'Permission Granted.'

Mark London Sims' bass solo on "Agent Double OO Soul" with The Untouchables at the Yucca Tap Room in Phoenix AZ. 10-14-17.

Jacquelyn Levy intro duet with Mark London Sims on Pedulla Fretless Bass.