Bass solo at Worldfest.

Ben Harper covering a Peter Tosh song, 'You can't Blame the Youth.' Rock Deadrick on drums, 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 O Soul with The Untouchables at the Yucca Tap Room in Phoenix AZ. 10-14-17.

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