therapies ,treatments and price of a day at the Spa?

I am a thirty two year old woman residing in manhattan and i am very fond of spa.but since i have been working at such late hours it becomes impossible for me to take out time to pamper myself.so this time i have decided to go for a spa treatment.before going for a spa i would like to know that what are the names of the spas that are nearest to my house and also what are the packages,therapies and treatments that these spa offer ?are there any kind of discounts which they offer to the first timers or are rates of spa fixed?