How to build up clientele for a self employed massage therapist?

[cwnhs]

I work with 2 girls who are sisters and just got out of school and are rmt. They are working for themselves and are paying rent for their room. Its been about 7 months. They have a few clients of as right now. I talked to them about making a coupon or some kind of discount to get people in but they said as rmt they are not allowed to give coupons or discounts. I also suggested they accept walk ins but they said rmt don't accept walk ins and don't sit at work waiting for clients. That they only come in when they have a client and that's the way it works. Im an acupuncturist and have a decent amount of client traffic and have been in the business just over 2 years. Im always at the clinic everyday 9:30am to 5:00pm and Saturdays appointment only. However the girls are never at the clinic. They come in just in time for a client and then leave right after. Sometimes the client is there before them. We have done a few out reaches and plan to do more. Do you have any suggestions that could help these girls? I know its hard but I would like to see these girls get busy and successful with their business. According to them this is how all rmt work