Buy David Marshall School of Hairdressing vouchers for deals on Hair Salon Services. A haircut is an easy way to instantly update your look, so head to David Marshall School of Hairdressing and receive a haircut, blow dry, and conditioning treatment. Your talented stylist will use their skills to give you a look you love, choosing a style that suits your face and lifestyle. David Marshall opened his first salon more than 40 years ago, and the David Marshall School of Hairdressing -- located just off South Great George's Street -- now celebrates 30 years of providing great hair and training to some of Ireland's top hair stylists. Please note, your appointment will be with a trainee from the hairdressing school.