Drummer Nick Alvarez and tenor saxophonist Beau Barry, along with Babatu on a conga, serenade the afternoon strollers outside with some very nice "outside" jazz, at the northeast corner of Washington and Wabash, July 17, 2015. If you want to hear a bit of what they do, I found a short (under 5 minute) documentary about Alvarez, which includes footage of the pair doing the same thing on a different corner (State and Madison): <https://www.youtube.com/watch?v=dmbRO4Cu_tk> and from the same video series, another short documentary about Barry: <https://www.youtube.com/watch?v=XybulxO0DFY>