Review for Ameristar Casino Resort Spa Black Hawk Review For Centennial Buffet Google User May 8 '18 at 1:04 Went to the Ara spa for the day. Enjoyed a couple's massage and the spa amenities. Used the rooftop pool and hot tub and then the gender separate spa spaces. These had a hot tub, dry sauna, steam room, multiple head shower, and some toiletries. There was even fruit water and tea. Great place to go for the day and relax. View full site to comment or like