My choice of salon is not based on the salon and any marketing techniques. Years ago, I started going to a high end salon due to word of mouth. That is where I met my current stylist.
I have sense followed my stylist because I go based on her, her experience, her expertise, and quality of products she uses. It does not matter how many bells and whistles a salon has if they don't have quality stylists.
My stylist is now based in a suite which houses different suite sizes for stylists, spa services, manicure services, etc. Basically, she has her own business and simply rents her suite which is private. Many salons rent a station.
When my daughter was small, I planned my appointments based on when daughter was at Mother's Day Out or with my husband.
My daughter has seen the same stylist I do since she was about 14 or so. She is now 18.
I am typically very loyal to 1 person, brand, etc. and quality is a priority. I do pay about $200 for a color and cut. You can see the difference with top quality.
All that said, the type of salon you describe is one such as Sport Clips, Fantastic Sam's, etc.. Am I correct? It sounds like your friend is looking for a quick in and out service place that has a higher level of service. If that is so, then her prices should match the quick service plan.
She could market schools.. get in the school directory via advertising for a small fee, offer gift certificates, participate in giveaways at the school to get people in the door. Also, our neighborhood HOA has a website and anyone registered on our site can advertise his/her business for free and set up a small "booth" at the yearly BBQ sponsored by the HOA to advertise services.
Again, word of mouth is a proven success for advertising.
Best wishes to your friend!