Clay is a spa and a health club so you can work out then have a massage or other treatment.
It's located in the Union Square area.
Clay's specialty is massages and they highlight their aromatherapy massage.
I tried it and I have to say that it was very nice.
I paid about $120 for the hour-long massage (it was a Swedish one) and the aromatherapy oils were a part of the massage so obviously you don't have to pay extra because most massages include some kind of oil. But Clay lets you select the types of oils depending on the mood you're in - there's one for anti-stress, detox, energy, deep-heat among others.
It's a nice way to spend a day.