Last month, I celebrated my birthday and received birthday cards from several unexpected sources, including a spa I had frequented the previous year. In addition to the card, the spa also offered me a special birthday discount, a marketing move I always appreciate. Earlier this week, I was made aware of Client Appreciation Week at Blu Water Day Spa & Salon (Kensington, MD). From April 22-27, guests are encouraged to enjoy their favorite services at discounted prices. And those who mention the special product discount will also get 15 percent off all products. What are some of the ways your spa expresses gratitude for its clientele?