A beauty salon or beauty parlor (beauty parlour), or sometimes beauty shop, is an establishment dealing with cosmetic treatments for men and women. Other variations of this type of business include hair salons and spas. There is a distinction between a beauty salon and a hair salon and although many small businesses do offer both sets of treatments; beauty salons provide extended services related to skin health, facial aesthetics, foot care, nail manicures, aromatherapy — even meditation, oxygen therapy, mud baths and many other services.
If you are a man, you are allowed to run a salon for men with men only serving men.
Women can also run a salon for women with women only serving women, keeping in mind the rules of Islam and not promoting non Hijab.