From the Bureau of Labor Statistics:
Barbers, cosmetologists, and other personal appearance workers held about 754,000 jobs in 2002. Of these, barbers, hairdressers, hairstylists, and cosmetologists held 651,000 jobs; manicurists and pedicurists, 51,000; skin care specialists, 25,000; and shampooers, 25,000.
Most of these workers are employed in beauty salons or barber shops, but they are also found in nail salons, department stores, nursing and other residential care homes, and drug and cosmetics stores. Nearly every town has a barbershop or beauty salon, but employment in this occupation is concentrated in the most populous cities and States.
Almost half of all barbers, cosmetologists, and other personal appearance workers are self-employed. Many own their own salon, but a growing number lease booth space or a chair from the salon’s owner.