Yeah, you can find the salons as SanDiego1K mentioned (nearly) anywhere in Vietnam, especially in the North. In my opinion, hair salon is the most friendly kind of "spa" where Vietnamese usually come and relax. It's really really local with many stories to tell. They don't only provide hair related services but also makeup, nail manicure, and sometimes baby sitting or psychological counseling in rustic way. Thousands of women from our poor provinces move to big cities, firstly work as a maid-and-apprentice in a salon then move to another area of the city or come back home to open their own salon, earn living for the whole family. Well, it's off-topic now. Here's some tips for you to have a good hair salon tour:

- Ask a quite trustworthy local (hotel staff or friends of a friend) about the place and price. If it's possible, let the local friend go with you to ask the price and explain what you want, at least in the first time.

- Bring your own gear as well as regular hair care products, if you want to assure a safe and allergic-free tour.

- Avoid the days around public holidays, especially from late December to early February, they're extremely busy and don't have enough time/health to treat you well.

- If they do their job well and the price is lower than you expected, please leave some loose change as a tip.

- Don't sleep and if you can't help sleeping, don't snore.