It is a regular barber shop with a large number of kids. For many locals, myself included, it is the regular local barber shop. I Get my hair cut there about every four weeks and they have lots of other regular customers.
One important thing to remember at the MK Barber Shop. When they removed the old antique cash register and put in a terminal to allow use of credit cards and hotel charges and the like they hooked into The Emporium's network. The register, unlike ones in table service restaurants, cannot handle tips as part of the transaction.
So if you are planning on using the Harmony Barber Shop please be aware that if you are using any sort of card you cannot add a tip on the card and should have cash available for tipping.