I'm pretty laid back about my hair too, actually, but I have to get it cut at least once every eight months or so or it goes totally crazy. I have very similar hair to Hermione (wavy and bushy, and far too thick for its own good), and this "health trim" every six to eight months really helps.
Originally posted by Aida Luthien
As for Hermoine, I'm pretty laid back about my hair, I tend to cut it and then let it grow back in. I only get a hair cut once a year and I have other female friends who do the same. I don't see why Hermoine wouldn't just wait for vacation to cut her hair, if she preferred a Muggle hairdresser.
Originally posted by Natalie
"Excuse me, Master, but I need to get my hair blow-dried today."
Yes, that is a good idea. It would be a lot like Ollivander's tape measure. The only downfall I could see is that some people might view it as the hairdresser being awfully disconnected with his work. If he or she doesn't properly pay attention for a moment, some poor person could end up with a very unfortunate haircut that could be difficult to fix.
Originally posted by Tafka
A proper Wizarding barber might have their own equipment, but instead of using it in the muggle style (someone like Narcissa Malfoy would never stand for that!) they charm the equipment to do the work for them!