This sort of sales pressure used to happen to me a lot in hair salons. I would go in for a simple cut and style, and then while the stylist had me captive in the chair, he or she would pepper me with questions about what sort of hair products I use at home. Then they would explain why those products were inferior or all wrong for me, and they would start extolling the hair products that were sold in the salon. In some cases, it was almost like I was sitting though a 30 minute long personal infomercial, as they used a certain shampoo/conditioner/styling product on me and talked about the great benefits of the products. I would be weary of hearing about it, but at the same time, this is the person who is actively cutting your hair, so I was in a vulnerable position with them. Other times, they would launch into speeches about how I should consider a certain service that they offer (coloring, highlights, deep conditioning, etc.) Then as they walked me the register, they'd ask if I wanted to take home a few bottles of that great product, or if I wanted to go ahead and book that salon service?
I finally found a stylist who goes very, very easy on trying to sell things to me while I am in her chair, and I love her for it. She is worth her weight in gold.