I have a pair of vintage Ray Ban sunglasses that were much too loose and would fall off. My wife suggested taking them to Acuity Eye Center since she had gotten eyeglasses there and was happy with their service.
Upon entering Acuity, I was greeted with a pleasant smile and a happy "can I help you?" by one of the ladies behind the counter. I explained that my sunglasses were too loose and asked if they could fix them. She assured me she could and asked me to have a seat. Less than five minutes later, she returned with my Ray Bans and they now fit perfectly! I asked what I owed and was told, "No Charge!" Keep in mind, they did not know who I was or that my wife is a customer!