I posted a another shot from the same coffee shop earlier, from the same photo session, dedicated to SHOTS magazine, in an assignment to capture the jurney of the creative people to work, and what is the things that inspire them, in each country of the world.
I preffered to desaturated the picture to remove the color clutter in PS.
I bounced the light of the 550EX Canon flash on a white umbrella, using a IR transimetter fixed on the camera hot shoe. Just to balance the lights of the coffee, yet I kept the longer shutter speed, to capture the players motion, to have a contrast with the man setting at the back of the frame, staring at us, and no body was bothered at all with all the photo gear was set.