Man rubs instrument neck inside glass truck

Was walking on Bleeker street in NYC and saw this glass windowed truck with musicians inside, playing music on a very cold Friday, on my way to the one man show of a friend at Pangea. There were many folks standing on the sidewalk, listening to the tunes. I’m sure it was great for the musicians to be inside a cozy truck since it was seriously cold outside. I’m a NY’er so, seeing street musicians is always great.